[code-quality] Test for checking linefeeds

Hi, I don't want to reinvent to bicycle (even though it is easy), so is there a support for checking linefeeds in any of the existing linter tools? The two checks in particular are interesting: 1. test that files don't have mixed linefeeeds 2. test that files comply with project linefeed style (LF in particular) This is needed for Travis checks, but I also want to run it standalone on Windows, so grep won't work. https://github.com/spyder-ide/spyder/issues/2424 Thanks. -- anatoly t.