* master: (24 commits)
  Adds a PHILOSOPHY.md
  Externalize strings from `/app/views/abuse_reports`
  Fix Issuable container element selector for shortcuts handling
  Enable Rubocop on lib/gitlab
  Add user docs for Pages access control
  Added information about syntax highlighting in Web IDE. Fixes gitlab-org/gitlab-ce#53571
  Align issue status label and confidential icon
  Externalize strings from `/app/views/repository_check_mailer`
  Remove instances of `@extend .monospace`
  Resolve "The reply shortcut can add any text of the page to the "comment" text area"
  Upgrade escape_utils to 1.2.1
  Add dedicated runner tags to assets job
  Upgrade gitlab eslint config to latest
  Fix broken karma specs
  Disable conflicting eslint rules
  Prettify all the things
  Upgrade prettier to 1.15.2
  Added a test for open merge request files
  Update CHANGELOG.md for 11.4.7
  Open first 10 merge request files in IDE
  ...