emacs 에서 ^M 삭제하기

1. type: 

        C-x RET C undecided-unix RET C-x C-w RET y

2. go to the beginning of the document

3. type:

	M-x replace-string RET C-q C-m RET RET

   where "RET" means <press the RETURN key> and things like C-q mean
   "hold control key and press the q" key.