Fixed javadoc issues

src/main/java/org/apache/commons/cli/Util.java

@@ -196,7 +196,8 @@ private static boolean isWhitespace(final char c) {
      * Returns the {@code defaultValue} if {@code str} is empty.
      * @param str The string to check
      * @param defaultValue the default value if the string is empty.
-     * @return the {@code defaultValue} if {@code str} is empty.
+     * @param <T> The type of arguments.
+     * @return the {@code defaultValue} if {@code str} is empty,
      * @since 1.9.0
      */
     public static <T extends CharSequence> T defaultValue(final T str, final T defaultValue) {

src/main/java/org/apache/commons/cli/help/AbstractHelpFormatter.java

@@ -89,7 +89,7 @@ protected AbstractHelpFormatter(final HelpWriter helpWriter, final OptionFormatt
     }
 
     /**
-     * Converts a collection of {@link Option}s into a {@TableDefinition}.
+     * Converts a collection of {@link Option}s into a {@link TableDefinition}.
      * @param options The options to create a table for.
      * @return the TableDefinition.
      */