Merge remote-tracking branch 'upstream/master' into fix-git-hooks-when-creating-file

* upstream/master:
  Ensure we have a project with a repo in GitlabMarkdownHelper specs
  Revert "Make sure TraceReader uses Encoding.default_external"
  Make sure TraceReader uses Encoding.default_external
  Update CONTRIBUTING.md after merging "up-for-grabs" and "Accepting Merge Requests" [ci skip]
  Use `:empty_project` where possible in finder specs
  Use `empty_project` where possible in controller specs
  Use `:empty_project` where possible in helper specs
  Don’t count tasks that are not defined as list items correctly
  Use a project factory with a repository where necessary
  Use `:empty_project` where possible throughout spec/lib
  Use hashrocket for dasherized attribute
  Remove markdown file extension and add anchor to link
  Fixed builds info link on project settings page
  Factories with a project association use `:empty_project` by default
  Update enviroments.md the example for deleting an environment is missing the "s" in environments. curl --request DELETE --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/1/environments/1"  wil 404