^M characters with vim

you can put this character with so for replace with 'abc' you can use
:%s/^M/abc/g

this is a good sample for work on all text files

vim *.txt
qq
:%s/^M$//g
:%s/^M/ /g
:wnext
q
@q
999@q


qq record commands and q stop recording and @q run it.


also this is a good alternative but sometimes not work

:set ff=unix //to unix file
:set ff=dos //to windows file


http://www.vim.org/tips/tip.php?tip_id=26