Fixes style-lint issues for blocks.scss

Closes #59838

See merge request gitlab-org/gitlab-ce!28251

Include MR information if possible when emailing notification of closing an issue

Closes #19569

See merge request gitlab-org/gitlab-ce!15610

CE backport of "Fix a broken spec for EE"

See merge request gitlab-org/gitlab-ce!28357

Fixes issues with show whitespace button in diffs

Closes #42597 and #58852

See merge request gitlab-org/gitlab-ce!28242

Add Let's Encrypt client

See merge request gitlab-org/gitlab-ce!27624

Part of adding Let's Encrypt certificates for pages domains

Add acme-client gem

Client is being initialized by private key stored in secrets.yml
Let's Encrypt account is being created lazily.
If it's already created, Acme::Client just gets account_kid by
calling new_account method

Make Let's Encrypt client an instance
Wrap order and challenge classes

Properly clear the merge error upon rebase failure

Closes #56139

See merge request gitlab-org/gitlab-ce!28319

i18n JS files starting with i

See merge request gitlab-org/gitlab-ce!28010

Resolve CE/EE diffs in help/index

Closes gitlab-ee#11051

See merge request gitlab-org/gitlab-ce!28335

Resolve CE/EE diffs in signup_box

Closes gitlab-ee#11047

See merge request gitlab-org/gitlab-ce!28336

If `merge_error` is ever set after a failure, it is never cleared, even
after a subsequent, successful rebase. We now clear this field whenever
a successful rebase occurs.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56139

clarify that "team" means "project" when considered for assignment purposes.

See merge request gitlab-org/gitlab-ce!27753

Add info about the single docs codebase effort

See merge request gitlab-org/gitlab-ce!28127

Fix loadJSONFixtures wrapper in Jest

See merge request gitlab-org/gitlab-ce!28328

Mock away document.createRange() in Jest

See merge request gitlab-org/gitlab-ce!28222

i18n JS files starting with n

See merge request gitlab-org/gitlab-ce!28132

Merge branch 'ce-quick-fix-58727-collapsed-sidebar-flyout-menu-items-don-t-appear-in-1200px-screen-size' into 'master'

CE Fix flyout nav on small viewports

See merge request gitlab-org/gitlab-ce!25998

Sessions can be listed for a given user

See merge request gitlab-org/gitlab-ce!28306

Suppress keychain access popup from chromedriver in Karma

See merge request gitlab-org/gitlab-ce!28310

Docs: couple of improvements to the Vuex frontend guide

See merge request gitlab-org/gitlab-ce!28257

Update mysql.md: variables values should be quoted, otherwise you get an...

See merge request gitlab-org/gitlab-ce!24214

Update mysql.md: variables values should be quoted, otherwise you get an "variables config should be a hash of key value pairs" error

[CI doc] Add chat value to only keyword

See merge request gitlab-org/gitlab-ce!27417

recursive/nested includes supported now

See merge request gitlab-org/gitlab-ce!28155

upgrate example ymal file, change type to stage.

See merge request gitlab-org/gitlab-ce!27992

docs: improve architecture component details

See merge request gitlab-org/gitlab-ce!28280

Docs: Add premium & silver badge to group project templates docs

Closes gitlab-ee#11587

See merge request gitlab-org/gitlab-ce!28304

Docs: update link to new security docs

See merge request gitlab-org/gitlab-ce!28299

docs: use sudo on gitlab-rake gitlab:features:*

See merge request gitlab-org/gitlab-ce!28288

Fix a typo mentioning SAST instead of DAST

See merge request gitlab-org/gitlab-ce!28308

Fix ES indexer install script - remove leading /

See merge request gitlab-org/gitlab-ce!28231

Fix typo in index.md

See merge request gitlab-org/gitlab-ce!28311

Removed the unnecessary line. It would be covered anyway by line 352...

See merge request gitlab-org/gitlab-ce!28228

Rjh/doc fixes for source install

See merge request gitlab-org/gitlab-ce!27916