** Changes in handling MS-DOS/MS-Windows text files.
Emacs handles three different conventions for representing end-of-line: CRLF for MSDOS, LF for Unix and GNU, and CR (used on the Macintosh). Emacs determines which convention is used in a specific file based on the contents of that file (except for certain special file names), and when it saves the file, it uses the same convention.

To save the file and change the end-of-line convention, you can use C-x RET f (set-buffer-file-coding-system) to specify a different coding system for the buffer. Then, when you save the file, the newly specified coding system will take effect. For example, to save with LF, specify undecided-unix (or some other ...-unix coding system); to save with CRLF, specify undecided-dos.