Upgrade from Babel 5 to Babel 6

See merge request !9072

oauth2.md: should use the provider's URL which is gitlab.example.com

See merge request !8173

Move 'User Snippets' Spinach feature to Rspec

See merge request !8574

Update LICENSE to 2017

See merge request !9079

Refactored diff notes Vue app

See merge request !9065

Try to disambiguate the Bug issue template

Closes #27718

See merge request !9064

Drop support for Ruby 2.1

Closes #27251

See merge request !9098

Fix menu link in CONTRIBUTING

See merge request !9084

Update API docs for new namespace format

Closes #27730

See merge request !9073

It now relies on its Vue bundle rather than the window. Fixes some reactivity issues that was happening in EE

Correctly transform an anchor link to GFM when copying it

See merge request !9080

fix alignment for long title

Closes #27610

See merge request !9020

Remove JIRA closed status icon

Closes #26701

See merge request !8944

Replaced images with the updates UX. Solving #23173

See merge request !8941

Update git clone docs

See merge request !8946

Update Prometheus documentation

Closes #27735

See merge request !9060

[ci skip]

[ci skip]

Reported in https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1905

[ci skip]

[ci skip]

[ci skip]

Allow creating nested group via UI

See merge request !8786

Nested groups API

See merge request !9034

Fix markdown link in Omniauth docs

See merge request !9082

[ci skip]

Mention reconfigure/restart in omniauth docs

Closes #27901

See merge request !9081

[ci skip]

Add cop that checks if add_column_with_default is used with up/down methods

See merge request !9077

Describe process around cherry-picking during the feature freeze

See merge request !9075