code: static public String getString(String msg, int arg)
  	{
  		return getString(msg, new Object[] { Integer.toString(arg) });
  	}
docs: Retrieves a message which takes 1 integer argument.
  
  @param msg
  String the key to look up.
  @param arg
  int the integer to insert in the formatted output.
  @return String the message for that key in the system message bundle.