fixed a typo.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@368 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

src/main/javassist/CtClass.java

     /**
      * Returns an array containing <code>CtMethod</code> objects
      * representing all the non-private methods of the class.
-     * That array includes pon-private methods inherited from the
+     * That array includes non-private methods inherited from the
      * superclasses.
      */
     public CtMethod[] getMethods() {