IO-212: Incorrect ProxyInputStream.skip() javadoc

Fixed the javadoc

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@805156 13f79535-47bb-0310-9956-ffa450edef68

Author: jukka

src/java/org/apache/commons/io/input/ProxyInputStream.java

@@ -108,7 +108,7 @@ public int read(byte[] bts, int off, int len) throws IOException {
     /**
      * Invokes the delegate's <code>skip(long)</code> method.
      * @param ln the number of bytes to skip
-     * @return the number of bytes to skipped or -1 if the end of stream
+     * @return the actual number of bytes skipped
      * @throws IOException if an I/O error occurs
      */
     @Override