diff --git a/src/main/java/org/apache/commons/collections4/ArrayUtils.java b/src/main/java/org/apache/commons/collections4/ArrayUtils.java
index 61cbb4821d..e997a12f5a 100644
--- a/src/main/java/org/apache/commons/collections4/ArrayUtils.java
+++ b/src/main/java/org/apache/commons/collections4/ArrayUtils.java
@@ -37,7 +37,6 @@
  */
 final class ArrayUtils {
 
-
     /**
      * Don't allow instances.
      */
diff --git a/src/main/java/org/apache/commons/collections4/CollectionUtils.java b/src/main/java/org/apache/commons/collections4/CollectionUtils.java
index 97e187b71e..3ae1da8737 100644
--- a/src/main/java/org/apache/commons/collections4/CollectionUtils.java
+++ b/src/main/java/org/apache/commons/collections4/CollectionUtils.java
@@ -1795,7 +1795,6 @@ public static <O> List<O> collate(final Iterable<? extends O> iterableA, final I
         return mergedList;
     }
 
-
     /**
      * Returns a {@link Collection} of all the permutations of the input collection.
      * <p>
diff --git a/src/main/java/org/apache/commons/collections4/ListUtils.java b/src/main/java/org/apache/commons/collections4/ListUtils.java
index 054c070a26..f7eb95c5eb 100644
--- a/src/main/java/org/apache/commons/collections4/ListUtils.java
+++ b/src/main/java/org/apache/commons/collections4/ListUtils.java
@@ -63,7 +63,6 @@ public int size() {
         }
     }
 
-
     /**
      * A helper class used to construct the longest common subsequence.
      */
diff --git a/src/main/java/org/apache/commons/collections4/QueueUtils.java b/src/main/java/org/apache/commons/collections4/QueueUtils.java
index 79ed44dccc..1cdb18d37d 100644
--- a/src/main/java/org/apache/commons/collections4/QueueUtils.java
+++ b/src/main/java/org/apache/commons/collections4/QueueUtils.java
@@ -42,7 +42,6 @@ public class QueueUtils {
      */
     private QueueUtils() {}
 
-
     /**
      * Returns a synchronized (thread-safe) queue backed by the given queue.
      * In order to guarantee serial access, it is critical that all access to the
diff --git a/src/main/java/org/apache/commons/collections4/SetUtils.java b/src/main/java/org/apache/commons/collections4/SetUtils.java
index 6d7bcd6221..a9269952a4 100644
--- a/src/main/java/org/apache/commons/collections4/SetUtils.java
+++ b/src/main/java/org/apache/commons/collections4/SetUtils.java
@@ -198,7 +198,6 @@ public static <T> Set<T> emptyIfNull(final Set<T> set) {
         return set == null ? Collections.<T>emptySet() : set;
     }
 
-
     /**
      * Gets a typed empty unmodifiable Set.
      * @param <E> the element type
diff --git a/src/main/java/org/apache/commons/collections4/SplitMapUtils.java b/src/main/java/org/apache/commons/collections4/SplitMapUtils.java
index b1bf9bcafe..4e8cceadd6 100644
--- a/src/main/java/org/apache/commons/collections4/SplitMapUtils.java
+++ b/src/main/java/org/apache/commons/collections4/SplitMapUtils.java
@@ -43,7 +43,6 @@ public class SplitMapUtils {
      */
     private SplitMapUtils() {}
 
-
     private static final class WrappedGet<K, V> implements IterableMap<K, V>, Unmodifiable {
         private final Get<K, V> get;
 
@@ -218,7 +217,6 @@ public Collection<V> values() {
         }
     }
 
-
     /**
      * Gets the specified {@link Get} as an instance of {@link IterableMap}.
      * If {@code get} implements {@link IterableMap} directly, no conversion will take place.
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java b/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
index c971469b3e..f9e09f0f7d 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
@@ -73,7 +73,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public int getCount(final Object object) {
         return decorated().getCount(object);
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java b/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
index 3c429dfbc1..dbd319f25b 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
@@ -62,7 +62,6 @@ protected SortedBag<E> decorated() {
         return (SortedBag<E>) super.decorated();
     }
 
-
     @Override
     public E first() {
         return decorated().first();
diff --git a/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java b/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
index 485bc5ec9a..d30e347344 100644
--- a/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
@@ -101,7 +101,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public boolean add(final E object, final int count) {
         validate(object);
diff --git a/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
index a56e239eb9..ebbc098996 100644
--- a/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
@@ -89,7 +89,6 @@ protected SortedBag<E> decorated() {
         return (SortedBag<E>) super.decorated();
     }
 
-
     @Override
     public E first() {
         return decorated().first();
diff --git a/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java b/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
index 3420f4ddfe..91f8822401 100644
--- a/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
@@ -100,7 +100,6 @@ public int hashCode() {
         }
     }
 
-
     @Override
     public boolean add(final E object, final int count) {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
index 3c226ebfdf..9aaeda2a3f 100644
--- a/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
@@ -83,7 +83,6 @@ protected SortedBag<E> getSortedBag() {
         return (SortedBag<E>) decorated();
     }
 
-
     @Override
     public synchronized E first() {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java b/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
index 7c5bed3e53..755b10eea0 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
@@ -121,7 +121,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public int getCount(final Object object) {
         return getBag().getCount(object);
@@ -132,7 +131,6 @@ public boolean remove(final Object object, final int nCopies) {
         return getBag().remove(object, nCopies);
     }
 
-
     @Override
     public boolean add(final E object, final int nCopies) {
         return getBag().add(transform(object), nCopies);
diff --git a/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
index cd192db538..8b7d16c123 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
@@ -112,7 +112,6 @@ protected SortedBag<E> getSortedBag() {
         return (SortedBag<E>) decorated();
     }
 
-
     @Override
     public E first() {
         return getSortedBag().first();
diff --git a/src/main/java/org/apache/commons/collections4/bag/TreeBag.java b/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
index 421b49d3a6..c1905a29b8 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
@@ -95,7 +95,6 @@ public boolean add(final E object) {
         return super.add(object);
     }
 
-
     @Override
     public E first() {
         return getMap().firstKey();
diff --git a/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java b/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java
index 0c38a97d4d..c5becd8d66 100644
--- a/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java
+++ b/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java
@@ -130,7 +130,6 @@ protected DualTreeBidiMap<V, K> createBidiMap(final Map<V, K> normalMap, final M
         return new DualTreeBidiMap<>(normalMap, reverseMap, inverseMap);
     }
 
-
     @Override
     public Comparator<? super K> comparator() {
         return ((SortedMap<K, V>) normalMap).comparator();
@@ -205,7 +204,6 @@ public OrderedBidiMap<V, K> inverseOrderedBidiMap() {
         return inverseBidiMap();
     }
 
-
     @Override
     public SortedMap<K, V> headMap(final K toKey) {
         final SortedMap<K, V> sub = ((SortedMap<K, V>) normalMap).headMap(toKey);
diff --git a/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java b/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java
index c6e46fe5e1..ec02fc8e9b 100644
--- a/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java
+++ b/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java
@@ -672,7 +672,6 @@ private Node<K, V> nextSmaller(final Node<K, V> node, final DataElement dataElem
         return rval;
     }
 
-
     /**
      * Compares two objects.
      *
diff --git a/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java b/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java
index 13fc7588d3..b946528413 100644
--- a/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java
@@ -103,7 +103,6 @@ protected void setCollection(final Collection<E> coll) {
         this.collection = coll;
     }
 
-
     @Override
     public boolean add(final E object) {
         return decorated().add(object);
diff --git a/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java b/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java
index 97544b51c8..065232f263 100644
--- a/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java
+++ b/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java
@@ -257,7 +257,6 @@ public boolean retainAll(final Collection<?> coll) {
         return changed;
     }
 
-
     /**
      * Provides checking for adding the index.
      *
diff --git a/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java b/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java
index 399221690f..25b69551c0 100644
--- a/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java
+++ b/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java
@@ -96,7 +96,6 @@ protected Collection<E> decorated() {
         return collection;
     }
 
-
     @Override
     public boolean add(final E object) {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java b/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java
index 44ddcbfdbb..609cf9407b 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java
@@ -52,7 +52,6 @@ protected ListIterator<E> getListIterator() {
         return iterator;
     }
 
-
     /** {@inheritDoc} */
     @Override
     public boolean hasNext() {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java b/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java
index 1d8583ba89..192d668d46 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java
@@ -53,7 +53,6 @@ protected MapIterator<K, V> getMapIterator() {
         return iterator;
     }
 
-
     /** {@inheritDoc} */
     @Override
     public boolean hasNext() {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java b/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java
index 5738ac1943..1a8e9f7bf0 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java
@@ -53,7 +53,6 @@ protected OrderedMapIterator<K, V> getOrderedMapIterator() {
         return iterator;
     }
 
-
     /** {@inheritDoc} */
     @Override
     public boolean hasNext() {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java b/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
index cf1915d13b..1b4b786a37 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
@@ -49,7 +49,6 @@ public class BoundedIterator<E> implements Iterator<E> {
     /** The position of the current element */
     private long pos;
 
-
     /**
      * Decorates the specified iterator to return at most the given number of elements,
      * skipping all elements until the iterator reaches the position at {@code offset}.
@@ -88,7 +87,6 @@ private void init() {
         }
     }
 
-
     @Override
     public boolean hasNext() {
         if (!checkBounds()) {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
index 7bf975a274..0b2b4e1231 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
@@ -27,7 +27,6 @@
 
 import org.apache.commons.collections4.list.UnmodifiableList;
 
-
 /**
  * Provides an ordered iteration over the elements contained in a collection of
  * ordered Iterators.
diff --git a/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java b/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java
index 94811a9b1b..4aa37815bb 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java
@@ -63,7 +63,6 @@ public abstract class LazyIteratorChain<E> implements Iterator<E> {
      */
     private Iterator<? extends E> lastUsedIterator;
 
-
     /**
      * Gets the next iterator after the previous one has been exhausted.
      * <p>
@@ -100,7 +99,6 @@ private void updateCurrentIterator() {
         }
     }
 
-
     /**
      * Return true if any Iterator in the chain has a remaining element.
      *
diff --git a/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
index ce38757eb7..7a37bd9d25 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
@@ -64,7 +64,6 @@ public static <E> PeekingIterator<E> peekingIterator(final Iterator<? extends E>
         return new PeekingIterator<>(iterator);
     }
 
-
     /**
      * Constructor.
      *
diff --git a/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java b/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
index 467a821075..b8b5efdc9c 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
@@ -61,7 +61,6 @@ public static <E> PushbackIterator<E> pushbackIterator(final Iterator<? extends
         return new PushbackIterator<>(iterator);
     }
 
-
     /**
      * Constructor.
      *
diff --git a/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
index 857c52d3ca..b3ace8563c 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
@@ -37,7 +37,6 @@ public class SkippingIterator<E> extends AbstractIteratorDecorator<E> {
     /** The position of the current element */
     private long pos;
 
-
     /**
      * Decorates the specified iterator to skip all elements until the iterator
      * reaches the position at {@code offset}.
@@ -71,7 +70,6 @@ private void init() {
         }
     }
 
-
     @Override
     public E next() {
         final E next = super.next();
diff --git a/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java b/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java
index 1cdd37ad11..09d9fe18bf 100644
--- a/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java
@@ -53,7 +53,6 @@ protected Map.Entry<K, V> getMapEntry() {
         return entry;
     }
 
-
     @Override
     public K getKey() {
         return entry.getKey();
diff --git a/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java b/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java
index 2c39bf5c45..514eef6935 100644
--- a/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java
+++ b/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java
@@ -131,7 +131,6 @@ public MultiKey(final K key1, final K key2) {
         this(newArray(key1, key2), false);
     }
 
-
     /**
      * Constructor taking three keys.
      * <p>
diff --git a/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java b/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java
index ce1b539a79..83267b6be0 100644
--- a/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java
+++ b/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java
@@ -99,7 +99,6 @@ protected void init() {
         header = createHeaderNode();
     }
 
-
     @Override
     public int size() {
         return size;
@@ -116,7 +115,6 @@ public E get(final int index) {
         return node.getValue();
     }
 
-
     @Override
     public Iterator<E> iterator() {
         return listIterator();
@@ -132,7 +130,6 @@ public ListIterator<E> listIterator(final int fromIndex) {
         return new LinkedListIterator<>(this, fromIndex);
     }
 
-
     @Override
     public int indexOf(final Object value) {
         int i = 0;
@@ -172,7 +169,6 @@ public boolean containsAll(final Collection<?> coll) {
         return true;
     }
 
-
     @Override
     public Object[] toArray() {
         return toArray(new Object[size]);
@@ -210,7 +206,6 @@ public List<E> subList(final int fromIndexInclusive, final int toIndexExclusive)
         return new LinkedSubList<>(this, fromIndexInclusive, toIndexExclusive);
     }
 
-
     @Override
     public boolean add(final E value) {
         addLast(value);
@@ -237,7 +232,6 @@ public boolean addAll(final int index, final Collection<? extends E> coll) {
         return true;
     }
 
-
     @Override
     public E remove(final int index) {
         final Node<E> node = getNode(index, false);
@@ -279,7 +273,6 @@ public boolean removeAll(final Collection<?> coll) {
         return modified;
     }
 
-
     /**
      * {@inheritDoc}
      * <p>
@@ -315,7 +308,6 @@ public void clear() {
         removeAllNodes();
     }
 
-
     public E getFirst() {
         final Node<E> node = header.next;
         if (node == header) {
diff --git a/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java b/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java
index 6c8d469455..23ee150653 100644
--- a/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java
@@ -74,7 +74,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public void add(final int index, final E object) {
         decorated().add(index, object);
diff --git a/src/main/java/org/apache/commons/collections4/list/PredicatedList.java b/src/main/java/org/apache/commons/collections4/list/PredicatedList.java
index fa22991369..7a64c8d9f5 100644
--- a/src/main/java/org/apache/commons/collections4/list/PredicatedList.java
+++ b/src/main/java/org/apache/commons/collections4/list/PredicatedList.java
@@ -105,7 +105,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public E get(final int index) {
         return decorated().get(index);
@@ -126,7 +125,6 @@ public E remove(final int index) {
         return decorated().remove(index);
     }
 
-
     @Override
     public void add(final int index, final E object) {
         validate(object);
diff --git a/src/main/java/org/apache/commons/collections4/list/TransformedList.java b/src/main/java/org/apache/commons/collections4/list/TransformedList.java
index 8631e8eee6..a55c9a2ef3 100644
--- a/src/main/java/org/apache/commons/collections4/list/TransformedList.java
+++ b/src/main/java/org/apache/commons/collections4/list/TransformedList.java
@@ -124,7 +124,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public E get(final int index) {
         return getList().get(index);
@@ -145,7 +144,6 @@ public E remove(final int index) {
         return getList().remove(index);
     }
 
-
     @Override
     public void add(final int index, E object) {
         object = transform(object);
diff --git a/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java b/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
index 711e3bd046..fc4dbad106 100644
--- a/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
+++ b/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
@@ -255,7 +255,6 @@ public V get(final Object key) {
         return entry.getValue();
     }
 
-
     /**
      * Puts a key-value mapping into this map.
      * Neither the key nor the value may be null.
diff --git a/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java b/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java
index 2f6bb707e0..a1a273e55e 100644
--- a/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java
+++ b/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java
@@ -657,7 +657,6 @@ public boolean remove(final Object obj) {
 
     }
 
-
     private final class Values extends AbstractCollection<V> {
 
         @Override
diff --git a/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java b/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java
index c060985444..08795a850c 100644
--- a/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java
@@ -72,7 +72,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public int getCount(final Object object) {
         return decorated().getCount(object);
diff --git a/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java b/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java
index 668a9db931..c7e55ce270 100644
--- a/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java
+++ b/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java
@@ -101,7 +101,6 @@ public int hashCode() {
         return decorated().hashCode();
     }
 
-
     @Override
     public int add(final E object, final int count) {
         validate(object);
diff --git a/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java b/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java
index f522897ca0..0093f6af16 100644
--- a/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java
+++ b/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java
@@ -97,7 +97,6 @@ public int hashCode() {
         }
     }
 
-
     @Override
     public int add(final E object, final int count) {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java b/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java
index 6ffebdaa8d..aa916951f0 100644
--- a/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java
@@ -68,7 +68,6 @@ protected Queue<E> decorated() {
         return (Queue<E>) super.decorated();
     }
 
-
     @Override
     public boolean offer(final E obj) {
         return decorated().offer(obj);
diff --git a/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java b/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java
index f79fc111e2..a96b86c6f0 100644
--- a/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java
@@ -272,7 +272,6 @@ public E get(final int index) {
         return elements[idx];
     }
 
-
     /**
      * Adds the given element to this queue. If the queue is full, the least recently added
      * element is discarded so that a new element can be inserted.
diff --git a/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java b/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java
index b5b031a473..8d8f51f2f0 100644
--- a/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java
@@ -85,7 +85,6 @@ protected Queue<E> decorated() {
         return (Queue<E>) super.decorated();
     }
 
-
     /**
      * Override to validate the object being added to ensure it matches
      * the predicate.
diff --git a/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java b/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java
index 710a256212..e716fd8ef5 100644
--- a/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java
@@ -109,7 +109,6 @@ protected Queue<E> getQueue() {
         return (Queue<E>) decorated();
     }
 
-
     @Override
     public boolean offer(final E obj) {
         return getQueue().offer(transform(obj));
diff --git a/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java b/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java
index c8dc509734..219e9d774c 100644
--- a/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java
@@ -140,7 +140,6 @@ public boolean retainAll(final Collection<?> coll) {
         throw new UnsupportedOperationException();
     }
 
-
     @Override
     public boolean offer(final E obj) {
         throw new UnsupportedOperationException();
diff --git a/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java b/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java
index 4ada1916e6..83a7f72c8d 100644
--- a/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java
+++ b/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java
@@ -237,7 +237,6 @@ private Snake getMiddleSnake(final int start1, final int end1, final int start2,
         throw new IllegalStateException("Internal Error");
     }
 
-
     /**
      * Build an edit script.
      *
diff --git a/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java b/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java
index 92f13d2fd6..0017579f80 100644
--- a/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java
@@ -61,7 +61,6 @@ protected NavigableSet<E> decorated() {
         return (NavigableSet<E>) super.decorated();
     }
 
-
     @Override
     public E lower(final E e) {
         return decorated().lower(e);
diff --git a/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java b/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java
index d27477216e..c0422264ee 100644
--- a/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java
+++ b/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java
@@ -90,7 +90,6 @@ protected NavigableSet<E> decorated() {
         return (NavigableSet<E>) super.decorated();
     }
 
-
     @Override
     public E lower(final E e) {
         return decorated().lower(e);
diff --git a/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java b/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java
index 82f0740e8a..b92937c042 100644
--- a/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java
+++ b/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java
@@ -110,7 +110,6 @@ protected NavigableSet<E> decorated() {
         return (NavigableSet<E>) super.decorated();
     }
 
-
     @Override
     public E lower(final E e) {
         return decorated().lower(e);
diff --git a/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java b/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java
index 62ab39f4fb..af2c7eb9dc 100644
--- a/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java
+++ b/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java
@@ -769,7 +769,6 @@ TrieEntry<K, V> followLeft(TrieEntry<K, V> node) {
         }
     }
 
-
     @Override
     public Comparator<? super K> comparator() {
         return getKeyAnalyzer();
@@ -1387,7 +1386,6 @@ public String toString() {
         }
     }
 
-
     /**
      * This is an entry set view of the {@link org.apache.commons.collections4.Trie} as returned by {@link Map#entrySet()}.
      */
@@ -2418,7 +2416,6 @@ public void remove() {
         }
     }
 
-
     /**
      * Reads the content of the stream.
      */
diff --git a/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java b/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java
index 6ea3af0f60..70636a8f41 100644
--- a/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java
+++ b/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java
@@ -74,7 +74,6 @@ public UnmodifiableTrie(final Trie<K, ? extends V> trie) {
         this.delegate = tmpTrie;
     }
 
-
     @Override
     public Set<Entry<K, V>> entrySet() {
         return Collections.unmodifiableSet(delegate.entrySet());
diff --git a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
index 2f8083aed5..b632a57245 100644
--- a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
@@ -1016,7 +1016,6 @@ public void testGetDoubleValue() {
         assertEquals(1.0, MapUtils.getDouble(in, "noKey", 1.0), 0);
         assertEquals(1.0, MapUtils.getDouble(in, "noKey", key -> 1.0), 0);
 
-
         final Map<String, String> inStr = new HashMap<>();
         final char decimalSeparator = getDecimalSeparator();
         inStr.put("str1", "2" + decimalSeparator + "0");
@@ -1127,7 +1126,6 @@ public void testGetByteValue() {
         assertEquals(val, MapUtils.getByte(in, "noKey", val), 0);
         assertEquals(val, MapUtils.getByte(in, "noKey", key -> val), 0);
 
-
         final Map<String, String> inStr = new HashMap<>();
         inStr.put("str1", "100");
 
diff --git a/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java b/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java
index 6a8cc3cc2f..ec6ab5729a 100644
--- a/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java
@@ -41,4 +41,3 @@ public void testUnmodifiableTrie() {
 
 }
 
-
diff --git a/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java
index 88f6cbc4e7..e4f66f9463 100644
--- a/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java
@@ -99,7 +99,6 @@ public SortedBag<T> makeConfirmedCollection() {
         return new TreeBag<>();
     }
 
-
     @Override
     public void resetEmpty() {
         this.setCollection(CollectionSortedBag.collectionSortedBag(makeObject()));
@@ -149,6 +148,5 @@ public SortedBag<T> getCollection() {
         return (SortedBag<T>) super.getCollection();
     }
 
-
     // TODO: Add the SortedBag tests!
 }
diff --git a/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java b/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
index d88cb81264..2fa2d8634d 100644
--- a/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
@@ -46,7 +46,6 @@ public CollectionBagTest() {
         super(CollectionBagTest.class.getSimpleName());
     }
 
-
     @Override
     public Bag<T> makeObject() {
         return CollectionBag.collectionBag(new HashBag<>());
@@ -91,7 +90,6 @@ protected int getIterationBehaviour() {
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/CollectionBag.fullCollection.version4.obj");
 //    }
 
-
     /**
      * Compares the current serialized form of the Bag
      * against the canonical version in SCM.
diff --git a/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
index e65c2db8d5..5861a9a424 100644
--- a/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
@@ -46,7 +46,6 @@ public CollectionSortedBagTest() {
         super(CollectionSortedBagTest.class.getSimpleName());
     }
 
-
     /**
      * Overridden because SortedBags don't allow null elements (normally).
      * @return false
@@ -110,7 +109,6 @@ public T[] getOtherNonNullElements() {
         return (T[]) elements;
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
@@ -123,7 +121,6 @@ public String getCompatibilityVersion() {
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/CollectionSortedBag.fullCollection.version4.obj");
 //    }
 
-
     /**
      * Compare the current serialized form of the Bag
      * against the canonical version in SCM.
diff --git a/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java
index 5777ef2ea6..e6f5a60790 100644
--- a/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java
@@ -30,7 +30,6 @@ public SynchronizedBagTest() {
         super(SynchronizedBagTest.class.getSimpleName());
     }
 
-
     @Override
     public Bag<T> makeObject() {
         return SynchronizedBag.synchronizedBag(new HashBag<>());
diff --git a/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java b/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java
index fd7516d205..bfa9805ef2 100644
--- a/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java
+++ b/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java
@@ -157,7 +157,6 @@ public String[] ignoredTests() {
         return new String[] { recursiveTest };
     }
 
-
 //    public void testCreate() throws Exception {
 //        resetEmpty();
 //        writeExternalFormToDisk((java.io.Serializable) map, "src/test/resources/data/test/DualTreeBidiMap.emptyCollection.version4.Test2.obj");
diff --git a/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java b/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
index 0bd179d008..34cd50d30a 100644
--- a/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
+++ b/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
@@ -48,7 +48,6 @@ public AbstractComparatorTest(final String testName) {
         super(testName);
     }
 
-
     /**
      * Implement this method to return a list of sorted objects.
      *
@@ -204,7 +203,6 @@ public void testComparatorCompatibility() throws IOException, ClassNotFoundExcep
                 }
             }
 
-
             // make sure the canonical form produces the ordering we currently
             // expect
             final List<T> randomList = getComparableObjectsOrdered();
diff --git a/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java
index d9217604cb..65a9a5f251 100644
--- a/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java
@@ -124,7 +124,6 @@ public final void nullElementsInArrayToGetInstance() {
         assertThrows(NullPointerException.class, () -> getPredicateInstance(new Predicate[] { null, null }));
     }
 
-
     /**
      * Tests {@code getInstance} with a null predicate collection
      */
diff --git a/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
index 77a11bd898..0248403a39 100644
--- a/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
@@ -24,7 +24,6 @@
 import org.apache.commons.collections4.functors.ComparatorPredicate.Criterion;
 import org.junit.jupiter.api.Test;
 
-
 public class ComparatorPredicateTest extends AbstractPredicateTest {
     private static final class TestComparator<T extends Comparable<T>> implements Comparator<T> {
         @Override
diff --git a/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
index 5243725c16..45d411db32 100644
--- a/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
@@ -23,7 +23,6 @@
 import org.apache.commons.collections4.Predicate;
 import org.junit.jupiter.api.Test;
 
-
 public class EqualPredicateTest extends AbstractPredicateTest {
     private static final EqualsTestObject FALSE_OBJECT = new EqualsTestObject(false);
     private static final EqualsTestObject TRUE_OBJECT = new EqualsTestObject(true);
diff --git a/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java b/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java
index 620ec1e3e4..3e9e12fc5f 100644
--- a/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java
+++ b/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java
@@ -55,7 +55,6 @@ protected void setUp() throws Exception {
         // Default: use standard constr.
         createIteratorWithStandardConstr = true;
 
-
         // create mocked Node Instances and fill Node[] to be used by test cases
         final Node node1 = createMock(Element.class);
         final Node node2 = createMock(Element.class);
diff --git a/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java b/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java
index ac65d2e510..8d7ac8d195 100644
--- a/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java
+++ b/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java
@@ -53,7 +53,6 @@ public void setUp() {
         testList.addAll(Arrays.asList(testArray));
     }
 
-
     @Override
     public boolean supportsRemove() {
         return false;
diff --git a/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java b/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java
index dfd1aefb47..762865f5e2 100644
--- a/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java
+++ b/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java
@@ -829,7 +829,6 @@ private void backwardTest(final ListIterator<E> iter, int i) {
                 "Exhausted iterator should raise NoSuchElement");
     }
 
-
     /**
      *  Tests the {@link ListIterator#add(Object)} method of the list
      *  iterator.
diff --git a/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java b/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java
index 5d19ce181e..5f23d87734 100644
--- a/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java
@@ -681,7 +681,6 @@ public void testMapContainsValue() {
         verify();
     }
 
-
     /**
      * Tests Map.equals(Object)
      */
@@ -1750,7 +1749,6 @@ public void verify() {
         }
     }
 
-
     /**
      * Bulk test {@link Map#keySet()}.  This method runs through all of
      * the tests in {@link AbstractSetTest}.
@@ -1942,7 +1940,6 @@ protected int getIterationBehaviour(){
         // the value equal to the value returned from the values iterator.
     }
 
-
     /**
      * Resets the {@link #map}, {@link #entrySet}, {@link #keySet},
      * {@link #values} and {@link #confirmed} fields to empty.
diff --git a/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java b/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java
index 2f74d2652b..f7da0a7dfa 100644
--- a/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java
@@ -83,7 +83,6 @@ public void testMapGetWithTransformer() {
         assertEquals(1, map.size());
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
diff --git a/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java b/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
index 02f8ecd49f..d3b1292b44 100644
--- a/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
@@ -65,7 +65,6 @@ public abstract class AbstractMultiValuedMapTest<K, V> extends AbstractObjectTes
     /** MultiValuedHashMap created by reset(). */
     protected MultiValuedMap<K, V> confirmed;
 
-
     public AbstractMultiValuedMapTest(final String testName) {
         super(testName);
     }
diff --git a/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java b/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java
index 331b11e477..a72652bf78 100644
--- a/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java
@@ -110,7 +110,6 @@ public MultiSet<T> makeFullCollection() {
         return multiset;
     }
 
-
     @Override
     public void resetEmpty() {
         this.setCollection(makeObject());
@@ -615,7 +614,6 @@ public void testMultiSetHashCode() {
         assertEquals(total, multiset2.hashCode());
     }
 
-
     /**
      * Bulk test {@link MultiSet#uniqueSet()}.  This method runs through all of
      * the tests in {@link AbstractSetTest}.
@@ -698,7 +696,6 @@ protected int getIterationBehaviour() {
         }
     }
 
-
     /**
      * Compare the current serialized form of the MultiSet
      * against the canonical version in SCM.
diff --git a/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java b/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java
index 8b213ed433..160e739eb7 100644
--- a/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java
+++ b/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java
@@ -116,7 +116,6 @@ public void testPoll() {
         assertThrows(UnsupportedOperationException.class, () -> queue.poll());
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
diff --git a/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java b/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java
index 02352be329..4efb28e00e 100644
--- a/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java
@@ -69,7 +69,6 @@ public NavigableSet<E> makeConfirmedCollection() {
         return new TreeSet<>();
     }
 
-
     /**
      * Verification extension, will check the order of elements,
      * the sets should already be verified equal.
diff --git a/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java b/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java
index c628025920..cf090a7133 100644
--- a/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java
@@ -124,7 +124,6 @@ public void testComparator() {
         assertNull(c, "natural order, so comparator should be null");
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4.1";
diff --git a/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java b/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java
index 574cb4292d..b91fcf7cf6 100644
--- a/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java
@@ -121,7 +121,6 @@ public void testComparator() {
         assertNull(c, "natural order, so comparator should be null");
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
diff --git a/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java b/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java
index f4802c5bdb..326565df6b 100644
--- a/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java
+++ b/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java
@@ -40,7 +40,6 @@ public boolean isAllowNullKey() {
         return false;
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";