* master: (33 commits)
  Improved code style on the issue_sidebar_spec.rb
  add CHAGELOG.md entry for !8831
  remove assets:compile step from relative_url docs
  update scripts and docs to reference the newly namespaced rake task
  namespace assets rake tasks to gitlab:assets:*
  correct gzip files if they exist as well
  automatically correct CSS urls on assets:precompile
  remove hard-coded assets path for ace editor modules
  Fixed cancel button in the services form not redirecting back to the integrations settings view
  Fix search bar search param encoding
  Fix a transient failure in the `Explore::ProjectsController` spec
  Fix filtering with multiple words
  Fix project name label's for reference in project settings
  Fixed merge request tabs extra margin
  Don't call `#uniq` on a relation
  Move Gitlab::Shell and Gitlab::ShellAdapter files to lib/
  Move ApplicationSetting DEFAULTS to `.defaults` instead
  Move a begin/rescue clause to ApplicationSetting.expire
  Use badge partial as single source of truth instead of having 2 partials doing the same
  Changes after review
  ...

* master: (389 commits)
  Document "No gems fetched from git repositories" policy [ci skip]
  Typos
  Small gramatical tweaks
  Typos
  Added PHP & NPM doc
  Use `:empty_project` where possible in request specs
  Add caching of droplab ajax requests
  Use `:empty_project` where possible in model specs
  Revert 3f17f29a
  Remove unused js response from refs controller
  Add MR id to changelog entry
  fixed small mini pipeline graph line glitch
  Prevent form to be submitted twice
  Fix Error 500 when repositories contain annotated tags pointing to blobs
  Fix /explore sorting (trending)
  Simplify wording in "adding an image" docs
  Remove "official merge window" from CONTRIBUTING.md [ci skip]
  Update repository check documentation
  Fixed flexbox and wrap issues
  Update two_factor_authentication.md
  ...

Add redis version to info rake task

See merge request !8283

Signed-off-by: Rémy Coutable <remy@rymai.me>