fix: remove malformed javadoc to fix -Werror build failure (#7393) (#7394)

* fix: prevent NPE when array contains null elements

When searching for a non-null key in an array that contains null elements,
the sentinel linear search would throw a NullPointerException because it
called array[i].compareTo(key) without checking if array[i] is null.

Added null check for array[i] in the while loop condition to prevent NPE
and return the correct index when array elements themselves are null.

Issue: #7318 (related)

* fix: remove malformed @author javadoc in AnyBaseToAnyBase (issue #7393)

* fix: remove malformed javadoc in ReverseString (part of issue #7393)

---------

Co-authored-by: OpenClaw Agent <agent@openclaw.ai>
Co-authored-by: OpenClaw Bot <fix-bug@openclaw.ai>
Co-authored-by: Deniz Altunkapan <deniz.altunkapan@outlook.com>

Author: 4 people

src/main/java/com/thealgorithms/conversions/AnyBaseToAnyBase.java

@@ -3,7 +3,7 @@
  * <p>
  * Time Complexity: O(n) [or appropriate complexity]
  * Space Complexity: O(n)
- * * @author Reshma Kakkirala
+ * @author Reshma Kakkirala
  */
 package com.thealgorithms.conversions;
 

src/main/java/com/thealgorithms/searches/SentinelLinearSearch.java

@@ -65,7 +65,8 @@ public <T extends Comparable<T>> int find(T[] array, T key) {
 
         int i = 0;
         // Search without bound checking since sentinel guarantees we'll find the key
-        while (array[i].compareTo(key) != 0) {
+        // Null check for array element to prevent NPE when array contains null elements
+        while (array[i] != null && array[i].compareTo(key) != 0) {
             i++;
         }
 

src/main/java/com/thealgorithms/strings/ReverseString.java

@@ -62,7 +62,7 @@ public static String reverse3(String string) {
     /**
      * Reverses the given string using a stack.
      * This method uses a stack to reverse the characters of the string.
-     * * @param str The input string to be reversed.
+     * @param str The input string to be reversed.
      * @return The reversed string.
      */
     public static String reverseStringUsingStack(String str) {