step 1 :
 code sample :
  Class A
  {
   private $b , $c ;
   function foo(){ return $this->b ;}
  }

step 2 :
  do :
   select $b, right click => rename, tip $t*, stop renaming
  note :
   * is a key in error

step 3 :
  observe result :
   code sample :
    Class A
    {
     private $t* , $c ;
     function foo(){ return $this->t* ;}
    }

step 4 :
 do :
  try to rename $t* like in step 2

Problem :
 We can't rename correctly after a key in error,
 if the property is repeated, got to replace|regexp fix the keystroke error