Add tests

Fix Rubocop offenses on `master`

See merge request !8516

fix changelog entry for !8425

See merge request !8512

Update rubocop and rubocop-rspec to fix build errors

See merge request !8466

Restore backup correctly when "BACKUP" environment variable is passed

Closes #26090

See merge request !8477

the author and mr fields got swapped,
see https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8425#note_21021254

Treat environments matching `production/*` as Production for Cycle Analytics

Closes #24139

See merge request !8500

Resolve "Add link to Branches page help text?"

Closes #26129

See merge request !8377

Pipelines Vue

See merge request !7196

Validate label's title length

See merge request !5767

Update the gitlab-markup gem to the version `1.5.1`

See merge request !8509

Remove the project_authorizations.id column

See merge request !8479

Change CI template linter textarea with Ace Editor

Closes #24179 and #19701

See merge request !8452

Use #parts instead of #part to read all the parts of the Message.

Closes #26463

See merge request !8507

Make play button on Pipelines page accessible via keyboard

See merge request !8496

Resolve "Certain buttons are not accessible via the keyboard (Web)"

Closes #26238

See merge request !8469

View spec for Ryancharris/gitlab milestone counter number with delimiter

See merge request !8482

Made download artifacts button accessible via keyboard

Closes #26446

See merge request !8493

Looks like I was accidentally using #part which was adding an extra
empty Mime section

Fix Double Spaced CI Log

Closes #19086

See merge request !8349

For Cycle Analytics, the environment `production` is treated as a
special case, and used to update the `first_deployed_to_production_at`
metric.

With the Review Apps changes, slash syntax is used to group related
environments in the list. This is mostly used for `review/<branch>`
environments, but it's possible for people to have multiple production
environments, and someone might then want to group them like
`production/eu`, `production/us`, or even just make it look prettier
with `production/www.example.com`. In any of these cases, the first
deploy to one of these `production/*` environments now is treated as a
Production deploy.

Make successful pipeline emails off for watchers

Closes #24845

See merge request !8176

Log LDAP blocking/unblocking events to application log

See merge request !8042

Don't instrument 405 Grape calls

Closes #26051

See merge request !8445

Added update guides for 8.16RC1

See merge request !8502