* upstream/master: (58 commits)
Update endpoint to username validator
change border color to variable
Add todo for deprecated user routes and more information about deprecation to changelog
Provide better error message to the user
Apply better hierarchy to markdown headers and issue/mr titles
Swapped button text manipulation outcomes for the toggle query
Fixed find file keyboard navigation
Update CHANGELOG for 8.12.7
Added download-button class and applied button margin
Enable activerecord_sane_schema_dumper for test
Updated logo from @luke
Fix broken specs on MySQL after https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6896
Fix Test Env (proper error handling when gitlab-shell is not clonned)
Fix randomly crashing spinach test for merge request
[Great spinach fix] Replace gsub with delete
Remove carriage returns from commit description as summary is on a newline and will always include carriage returns
Convert due_date_select.js filetype to es6.
Stop directly parsing due_date with Date.parse, prefer parsing implicitly.
Improve spec for pipeline metrics worker
Add Pipeline metrics worker
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