rubocop: disable Style/NegatedIf
rubocop: disable Style/NegatedIf

We have a lot of non-ruby contributors for whom "!" feels more
comfortable. I don't care that much, but I don't see any need to have CI
block their perfectly-fine code.

git/git-scm.com,git/git-scm.com,git/git-scm.com,git/git-scm.com