fix: remove trailing spaces and add newline at EOF

Author: Gokul45-45

ValidParentheses.java

@@ -6,28 +6,28 @@
 
 /**
  * Valid Parentheses Problem
- * 
+ *
  * Given a string containing just the characters '(', ')', '{', '}', '[' and ']',
  * determine if the input string is valid.
- * 
+ *
  * An input string is valid if:
  * 1. Open brackets must be closed by the same type of brackets.
  * 2. Open brackets must be closed in the correct order.
  * 3. Every close bracket has a corresponding open bracket of the same type.
- * 
+ *
  * Examples:
  * Input: "()"
  * Output: true
- * 
+ *
  * Input: "()[]{}"
  * Output: true
- * 
+ *
  * Input: "(]"
  * Output: false
- * 
+ *
  * Input: "([)]"
  * Output: false
- * 
+ *
  * @author Gokul45-45
  */
 public final class ValidParentheses {
@@ -71,4 +71,4 @@ public static boolean isValid(String s) {
         // Stack should be empty if all brackets are matched
         return stack.isEmpty();
     }
-}
+}

src/main/java/com/thealgorithms/stacks/ValidParentheses.java

@@ -29,4 +29,4 @@ void testNullAndOddLength() {
         assertFalse(ValidParentheses.isValid(null));
         assertFalse(ValidParentheses.isValid("(()"));
     }
-}
+}