Revert "maintain existing DOS EOL in .gemfiles even on POSIX systems"
Revert "maintain existing DOS EOL in .gemfiles even on POSIX systems"

This reverts commit 4a6c47b939aeb8caa02d568ef73870fd37ce58da.

robertwahler/basic_gem,robertwahler/repo_manager,robertwahler/mutagem,robertwahler/win32-autogui,robertwahler/revenc,robertwahler/basic_app,robertwahler/dynabix,robertwahler/repo_manager,robertwahler/oct