Enable the Style/PercentLiteralDelimiters cop and autocorrect offenses
What does this MR do?
It enables the Style/PercentLiteralDelimiters
cop and autocorrect offenses, as discussed in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6308.
Are there points in the code the reviewer needs to double check?
Not really.
Why was this MR needed?
To enforce the way we write arrays: always with []
.