fixing styling and formatting

Author: mohmmadAyesh

Diff for: String/CheckPalindrome.js

@@ -2,7 +2,7 @@
  * Checks if a string is a palindrome.
  * A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward.
  * Palindrome check is case sensitive; i.e., "Aba" is not considered a palindrome.
- * 
+ *
  * @param {string} str The input string to be checked for palindrome.
  * @returns {string} Returns 'Palindrome' if the input string is a palindrome,
  * 'Not a Palindrome' if it is not, or an error message if the input is not a valid string.