Merge branch 'dos2unix' into 'master'
Silence dos2unix errors The result is that if it 1) doesn't exist, or 2) exits with error, we don't quit making the submit file. This includes weird cases such as permission being denied on certain directories. It's really hard to imagine dos2unix legitimately failing, and even if it does, the autograder should be already changing CRLF to LFs in its test case normalization process. See merge request !2