DOC: Fix unbalanced grouping commands Doxygen warnings

Fix unbalanced grouping commands Doxygen warnings.

Fixes:
```
Modules/Core/Common/include/itkAutoPointer.h:261: warning: unbalanced grouping commands
```

warnings across classes.

The warning is raised when the
Utilities/Doxygen/itkdoxygen.pl

Doxygen Perl script processes the files at issue and starts a `/**@{`
block that gets interrupted by an unexpected symbol (e.g. a brace)
without being previously closed with the corresponding `/**@}*/`
ending token.

Raised for example in:
https://open.cdash.org/viewBuildError.php?type=1&buildid=8344134

Modules/Core/Common/include/itkAutoPointer.h

@@ -250,6 +250,7 @@ TransferAutoPointer(TAutoPointerBase & pa, TAutoPointerDerived & pb)
     pb.ReleaseOwnership(); // pb Release Ownership and clears
   }
 }
+
 } // end namespace itk
 
 #endif

Modules/Core/Common/include/itkBSplineDerivativeKernelFunction.h

@@ -186,6 +186,7 @@ class ITK_TEMPLATE_EXPORT BSplineDerivativeKernelFunction : public KernelFunctio
     itkGenericExceptionMacro("Evaluate not implemented for spline order " << SplineOrder);
   }
 };
+
 } // end namespace itk
 
 #endif

Modules/Core/Common/include/itkBSplineInterpolationWeightFunction.h

@@ -132,6 +132,7 @@ class ITK_TEMPLATE_EXPORT BSplineInterpolationWeightFunction
     return table;
   }() };
 };
+
 } // end namespace itk
 
 #ifndef ITK_MANUAL_INSTANTIATION

Modules/Core/Common/include/itkBSplineKernelFunction.h

@@ -181,6 +181,7 @@ class ITK_TEMPLATE_EXPORT BSplineKernelFunction : public KernelFunctionBase<TRea
     itkGenericExceptionMacro("Evaluate not implemented for spline order " << SplineOrder);
   }
 };
+
 } // end namespace itk
 
 #endif

Modules/Core/Common/include/itkBackwardDifferenceOperator.h

@@ -73,6 +73,7 @@ class ITK_TEMPLATE_EXPORT BackwardDifferenceOperator : public NeighborhoodOperat
     this->FillCenteredDirectional(coeff);
   }
 };
+
 } // namespace itk
 
 #ifndef ITK_MANUAL_INSTANTIATION

Modules/Core/Common/include/itkBufferedImageNeighborhoodPixelAccessPolicy.h

@@ -126,6 +126,7 @@ class BufferedImageNeighborhoodPixelAccessPolicy final
   {
     m_NeighborhoodAccessor.Set(imageBufferPointer + m_PixelIndexValue, pixelValue);
   }
+
 };
 
 } // namespace itk

Modules/Core/Common/include/itkCommonEnums.h

@@ -170,6 +170,7 @@ using IOFileModeType = CommonEnums::IOFileMode;
 using IOByteOrderType = CommonEnums::IOByteOrder;
 using CellGeometryType = CommonEnums::CellGeometry;
 #endif
+
 // Define how to print enumeration
 extern ITKCommon_EXPORT std::ostream &
                         operator<<(std::ostream & out, IOPixelEnum value);

Modules/Core/Common/include/itkConnectedImageNeighborhoodShape.h

@@ -93,6 +93,7 @@ namespace itk
  * \ingroup ImageIterators
  * \ingroup ITKCommon
  */
+
 template <unsigned int VImageDimension>
 class ConnectedImageNeighborhoodShape
 {
@@ -257,8 +258,8 @@ class ConnectedImageNeighborhoodShape
   {
     return (includeCenterPixel ? 1 : 0) + CalculateNumberOfConnectedNeighbors(maximumCityblockDistance);
   }
-};
 
+};
 
 /** Generates the offsets for a connected image neighborhood shape. */
 template <unsigned int VImageDimension, size_t VMaximumCityblockDistance, bool VIncludeCenterPixel>

Modules/Core/Common/include/itkConstantBoundaryImageNeighborhoodPixelAccessPolicy.h

@@ -144,8 +144,8 @@ class ConstantBoundaryImageNeighborhoodPixelAccessPolicy final
       m_NeighborhoodAccessor.Set(imageBufferPointer + m_PixelIndexValue, pixelValue);
     }
   }
-};
 
+};
 
 } // namespace itk
 

Modules/Core/Common/include/itkContinuousIndex.h

@@ -86,6 +86,7 @@ class ITK_TEMPLATE_EXPORT ContinuousIndex : public Point<TCoordRep, VIndexDimens
       (*this)[i] = static_cast<TCoordRep>(index[i]);
     }
   }
+
 };
 } // namespace itk
 

Modules/Core/Common/include/itkCovariantVector.h

@@ -254,6 +254,7 @@ class ITK_TEMPLATE_EXPORT CovariantVector : public FixedArray<T, VVectorDimensio
       (*this)[i] = static_cast<T>(pa[i]);
     }
   }
+
 };
 
 /** Premultiply Operator for product of a vector and a scalar.

Modules/Core/Common/include/itkDefaultConvertPixelTraits.h

@@ -77,6 +77,7 @@ class ITK_TEMPLATE_EXPORT DefaultConvertPixelTraits
   {
     return pixel.GetScalarValue();
   }
+
 };
 
 #define ITK_DEFAULTCONVERTTRAITS_NATIVE_SPECIAL(type)           \

Modules/Core/Common/include/itkExtractImageFilterRegionCopier.h

@@ -156,6 +156,7 @@ class ITK_TEMPLATE_EXPORT ExtractImageFilterRegionCopier : public ImageRegionCop
   {
     ImageRegionCopier<T1, T2>::operator()(destRegion, srcRegion);
   }
+
 };
 } // end namespace ImageToImageFilterDetail
 } // end namespace itk

Modules/Core/Common/include/itkFixedArray.h

@@ -426,6 +426,7 @@ class ITK_TEMPLATE_EXPORT FixedArray
   {
     return MakeFilled<FixedArray>(value);
   }
+
 };
 
 template <typename TValue, unsigned int VLength>

Modules/Core/Common/include/itkForwardDifferenceOperator.h

@@ -71,6 +71,7 @@ class ITK_TEMPLATE_EXPORT ForwardDifferenceOperator : public NeighborhoodOperato
   {
     this->FillCenteredDirectional(coeff);
   }
+
 };
 } // namespace itk
 

Modules/Core/Common/include/itkImageIterator.h

@@ -144,6 +144,7 @@ class ITK_TEMPLATE_EXPORT ImageIterator : public ImageConstIterator<TImage>
   ImageIterator(const ImageConstIterator<TImage> & it);
   Self &
   operator=(const ImageConstIterator<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageIteratorWithIndex.h

@@ -134,6 +134,7 @@ class ITK_TEMPLATE_EXPORT ImageIteratorWithIndex : public ImageConstIteratorWith
   ImageIteratorWithIndex(const ImageConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageLinearIteratorWithIndex.h

@@ -120,6 +120,7 @@ class ITK_TEMPLATE_EXPORT ImageLinearIteratorWithIndex : public ImageLinearConst
   ImageLinearIteratorWithIndex(const ImageLinearConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageLinearConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRandomIteratorWithIndex.h

@@ -120,6 +120,7 @@ class ITK_TEMPLATE_EXPORT ImageRandomIteratorWithIndex : public ImageRandomConst
   ImageRandomIteratorWithIndex(const ImageRandomConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageRandomConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRandomNonRepeatingIteratorWithIndex.h

@@ -132,6 +132,7 @@ class ITK_TEMPLATE_EXPORT ImageRandomNonRepeatingIteratorWithIndex
   ImageRandomNonRepeatingIteratorWithIndex(const ImageRandomNonRepeatingConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageRandomNonRepeatingConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRegionConstIteratorWithIndex.h

@@ -191,6 +191,7 @@ class ITK_TEMPLATE_EXPORT ImageRegionConstIteratorWithIndex : public ImageConstI
    * \sa operator++ */
   Self &
   operator--();
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRegionConstIteratorWithOnlyIndex.h

@@ -187,6 +187,7 @@ class ITK_TEMPLATE_EXPORT ImageRegionConstIteratorWithOnlyIndex : public ImageCo
    * \sa operator++ */
   Self &
   operator--();
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRegionExclusionIteratorWithIndex.h

@@ -121,6 +121,7 @@ class ITK_TEMPLATE_EXPORT ImageRegionExclusionIteratorWithIndex
   ImageRegionExclusionIteratorWithIndex(const ImageRegionExclusionConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageRegionExclusionConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRegionIterator.h

@@ -133,6 +133,7 @@ class ITK_TEMPLATE_EXPORT ImageRegionIterator : public ImageRegionConstIterator<
   ImageRegionIterator(const ImageRegionConstIterator<TImage> & it);
   Self &
   operator=(const ImageRegionConstIterator<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRegionIteratorWithIndex.h

@@ -126,6 +126,7 @@ class ITK_TEMPLATE_EXPORT ImageRegionIteratorWithIndex : public ImageRegionConst
   ImageRegionIteratorWithIndex(const ImageRegionConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageRegionConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageRegionReverseIterator.h

@@ -122,6 +122,7 @@ class ITK_TEMPLATE_EXPORT ImageRegionReverseIterator : public ImageRegionReverse
   ImageRegionReverseIterator(const ImageRegionReverseConstIterator<TImage> & it);
   Self &
   operator=(const ImageRegionReverseConstIterator<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageReverseIterator.h

@@ -118,6 +118,7 @@ class ITK_TEMPLATE_EXPORT ImageReverseIterator : public ImageRegionReverseConstI
   ImageReverseIterator(const ImageRegionReverseConstIterator<TImage> & it);
   Self &
   operator=(const ImageRegionReverseConstIterator<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageScanlineIterator.h

@@ -95,6 +95,7 @@ class ITK_TEMPLATE_EXPORT ImageScanlineIterator : public ImageScanlineConstItera
   ImageScanlineIterator(const ImageScanlineConstIterator<TImage> & it);
   Self &
   operator=(const ImageScanlineConstIterator<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkImageSink.h

@@ -198,6 +198,7 @@ class ImageSink
    */
   double m_CoordinateTolerance{ Self::GetGlobalDefaultCoordinateTolerance() };
   double m_DirectionTolerance{ Self::GetGlobalDefaultDirectionTolerance() };
+
 };
 
 } // namespace itk

Modules/Core/Common/include/itkImageSliceIteratorWithIndex.h

@@ -122,6 +122,7 @@ class ITK_TEMPLATE_EXPORT ImageSliceIteratorWithIndex : public ImageSliceConstIt
   ImageSliceIteratorWithIndex(const ImageSliceConstIteratorWithIndex<TImage> & it);
   Self &
   operator=(const ImageSliceConstIteratorWithIndex<TImage> & it);
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkMemoryUsageObserver.h

@@ -87,8 +87,10 @@ class ITKCommon_EXPORT LinuxMemoryUsageObserver : public MemoryUsageObserverBase
 public:
   /** destructor */
   ~LinuxMemoryUsageObserver() override;
+
   MemoryLoadType
   GetMemoryUsage() override;
+
 };
 #endif // __linux__
 
@@ -98,8 +100,10 @@ class ITKCommon_EXPORT MacOSXMemoryUsageObserver : public MemoryUsageObserverBas
 public:
   /** destructor */
   ~MacOSXMemoryUsageObserver() override;
+
   MemoryLoadType
   GetMemoryUsage() override;
+
 };
 #endif // Mac OS X
 
@@ -109,8 +113,10 @@ class ITKCommon_EXPORT SunSolarisMemoryUsageObserver : public MemoryUsageObserve
 public:
   /** destructor */
   virtual ~SunSolarisMemoryUsageObserver();
+
   virtual MemoryLoadType
   GetMemoryUsage();
+
 };
 #endif // Sun Solaris
 
@@ -120,8 +126,10 @@ class ITKCommon_EXPORT SysResourceMemoryUsageObserver : public MemoryUsageObserv
 public:
   /** destructor */
   ~SysResourceMemoryUsageObserver() override;
+
   MemoryLoadType
   GetMemoryUsage() override;
+
 };
 
 #  if defined(ITK_HAS_MALLINFO) || defined(ITK_HAS_MALLINFO2)
@@ -134,9 +142,12 @@ class ITKCommon_EXPORT MallinfoMemoryUsageObserver : public MemoryUsageObserverB
 public:
   /** destructor */
   ~MallinfoMemoryUsageObserver() override;
+
   MemoryLoadType
   GetMemoryUsage() override;
+
 };
+
 #  endif // Mallinfo
 #endif   // !defined(WIN32) && !defined(_WIN32)
 

Modules/Core/Common/include/itkMultiThreaderBase.h

@@ -267,6 +267,7 @@ INTEL_PRAGMA_WARN_POP
       STD_EXCEPTION,
       UNKNOWN
     } ThreadExitCode;
+
   };
   // clang-format off
 ITK_GCC_PRAGMA_DIAG_POP()

Modules/Core/Common/include/itkNeighborhoodIterator.h

@@ -332,6 +332,7 @@ class ITK_TEMPLATE_EXPORT NeighborhoodIterator : public ConstNeighborhoodIterato
   {
     this->SetPixel(this->GetCenterNeighborhoodIndex() - this->GetStride(axis), v);
   }
+
 };
 } // namespace itk
 

Modules/Core/Common/include/itkOrientationAdapterBase.h

@@ -62,6 +62,7 @@ class ITK_TEMPLATE_EXPORT [[deprecated("Since ITK 5.3 use SpatialOrientationAdap
   /** destructor, to silence "virtual class has non-virtual destructor()"
     warnings */
   virtual ~OrientationAdapterBase() = default;
+
 };
 } // namespace itk
 #else // ITK_LEGACY_REMOVE

Modules/Core/Common/include/itkPeriodicBoundaryCondition.h

@@ -109,6 +109,7 @@ class ITK_TEMPLATE_EXPORT PeriodicBoundaryCondition : public ImageBoundaryCondit
    */
   OutputPixelType
   GetPixel(const IndexType & index, const TInputImage * image) const override;
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkPoint.h

@@ -119,6 +119,7 @@ class ITK_TEMPLATE_EXPORT Point : public FixedArray<TCoordRep, VPointDimension>
   Point(const TPointValueType & v)
     : BaseArray(v)
   {}
+
   Point(const ValueType & v)
     : BaseArray(v)
   {}

Modules/Core/Common/include/itkShapedFloodFilledFunctionConditionalConstIterator.h

@@ -294,6 +294,7 @@ class ITK_TEMPLATE_EXPORT ShapedFloodFilledFunctionConditionalConstIterator : pu
    * 8 (26 in 3D).
    */
   bool m_FullyConnected;
+
 };
 } // end namespace itk
 

Modules/Core/Common/include/itkShapedImageNeighborhoodRange.h

@@ -802,6 +802,7 @@ class ShapedImageNeighborhoodRange final
     m_RelativeLocation = location;
     SubtractIndex(m_RelativeLocation, m_BufferedRegionData.m_Index);
   }
+
 };
 
 } // namespace itk

Modules/Core/Common/include/itkSymmetricEigenAnalysis.h

@@ -110,6 +110,7 @@ permuteColumnsWithSortIndices(QMatrix & eigenVectors, const std::vector<int> & i
   // Apply it
   eigenVectors = eigenVectors * perm;
 }
+
 } // end namespace detail
 
 /** \class SymmetricEigenAnalysisEnums

Modules/Core/Common/include/itkZeroFluxNeumannImageNeighborhoodPixelAccessPolicy.h

@@ -124,6 +124,7 @@ class ZeroFluxNeumannImageNeighborhoodPixelAccessPolicy final
   {
     m_NeighborhoodAccessor.Set(imageBufferPointer + m_PixelIndexValue, pixelValue);
   }
+
 };
 
 } // namespace itk

Modules/Core/GPUCommon/include/itkGPUInPlaceImageFilter.h

@@ -102,6 +102,7 @@ class ITK_TEMPLATE_EXPORT GPUInPlaceImageFilter
    * \sa ProcessObject::ReleaseInputs() */
   void
   ReleaseInputs() override;
+
 };
 
 } // end namespace itk

Modules/Core/Mesh/include/itkMesh.h

@@ -276,6 +276,7 @@ class ITK_TEMPLATE_EXPORT Mesh : public PointSet<TPixelType, VDimension, TMeshTr
     {
       return ((m_CellId == r.m_CellId) && (m_FeatureId == r.m_FeatureId));
     }
+
   }; // End Class: Mesh::BoundaryAssignmentIdentifier
 
   /** Used for manipulating boundaries and boundary attributes.  A