Display CRLF as ^M:
:e ++ff=unix
Substitute CRLF for LF:
:setlocal ff=unix
:w
:e
http://stackoverflow.com/questions/3852868/how-to-make-vim-show-m-and-substitute-it
:e ++ff=unix
:setlocal ff=unix
:w
:e
http://stackoverflow.com/questions/3852868/how-to-make-vim-show-m-and-substitute-it