code: func CommentM(filename string, reLine []string) error {
  	e, err := NewEdit(filename)
  	if err != nil {
  		return err
  	}
  
  	err = e.Comment(reLine)
  	err2 := e.Close()
  	if err != nil {
  		return err
  	}
  	return err2
  }
docs: // CommentM inserts the comment character in lines that mach any regular expression
  // in reLine, in the named file.