Update Longest_Substring_without_Repeating_Character.java

Author: NextGenGk

Strings/Longest_Substring_without_Repeating_Character.java

@@ -67,5 +67,5 @@ public int lengthOfLongestSubstring(String s) {
 // Time & Space Complexity -
 /*
 Time - O(N), where N is linearly traversing an string
-Space - O(N) , because we using Set DS
+Space - O(N), because we using Set DS
 */