Add dealing with newlines for editor to 5.1-to-6.0
Created by: bbodenmiller
backport of https://github.com/gitlabhq/gitlabhq/commit/2d681c0d1ed14bf23c041aa04fa3e77caceda9a1
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: bbodenmiller
backport of https://github.com/gitlabhq/gitlabhq/commit/2d681c0d1ed14bf23c041aa04fa3e77caceda9a1