LANG-1422: Add null-safe StringUtils.valueOf(char[]) to delegate to String.valueOf(char[])

Fix checkstyle violations

src/main/java/org/apache/commons/lang3/StringUtils.java

@@ -9413,10 +9413,10 @@ public class StringUtils {
         }
         return result;
     }
-    
+
     /**
-     *  Returns the string representation of the {@code char} array or null.
-     *  
+     * Returns the string representation of the {@code char} array or null.
+     *
      * @param value the character array.
      * @return a String or null
      * @see String#valueOf(char[])
@@ -9425,5 +9425,5 @@ public class StringUtils {
     public static String valueOf(final char[] value) {
         return value == null ? null : String.valueOf(value);
     }
-    
+
 }

src/test/java/org/apache/commons/lang3/StringUtilsValueOfTest.java

@@ -21,7 +21,7 @@ import org.junit.jupiter.api.Test;
 
 /**
  * Tests {@link StringUtils}'s valueOf() methods.
- * 
+ *
  * @since 3.9
  */
 public class StringUtilsValueOfTest {