code: function checkFillingChar( doc )
  	{
  		var fillingChar = doc && getFillingChar( doc );
  		if ( fillingChar )
  		{
  			// Use this flag to avoid removing the filling char right after
  			// creating it.
  			if ( fillingChar.getCustomData( 'ready' ) )
  				removeFillingChar( doc );
  			else
  				fillingChar.setCustomData( 'ready', 1 );
  		}
  	}
docs: Checks if a filling char has been used, eventualy removing it (#1272).