javadoc fix

core/java/src/gnu/getopt/Getopt.java

@@ -841,7 +841,7 @@ exchange(String[] argv)
   * Put in a separate method because this needs to be done twice.  (The
   * C getopt authors just copy-pasted the code!).
   *
-  * @param longind A buffer in which to store the 'val' field of found LongOpt
+  * Uses field longind, A buffer in which to store the 'val' field of found LongOpt
   *
   * @return Various things depending on circumstances
   */