File view line number alignment is slightly off
This seems to also happen on the file view in ymls, at least:
https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/categories.yml
The recent line-height fix sets the vertical rhythm correctly https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23090
But it seems that both parts have a slight mismatch in the starting point.
By adjusting the line numbers container 4px lower (adding 4px to the padding-top of .line-numbers) it seems to pair up, but needs testing.
.file-content.code .line-numbers {
padding-top: 14px;
}
Source: https://gitlab.com/gitlab-org/gitlab-ce/issues/51668#note_124413276
/cc @annabeldunstone, @andr3