Merge branch 'master' into 'dz-rename-reserved-project-names'

spec/models/project_spec.rb

spec/models/project_statistics_spec.rb

spec/requests/api/groups_spec.rb

spec/requests/api/projects_spec.rb

spec/requests/git_http_spec.rb

spec/services/git_push_service_spec.rb

...s/merge_requests/merge_request_diff_cache_service_spec.rb

...pport/features/issuable_slash_commands_shared_examples.rb

spec/workers/project_cache_worker_spec.rb

vendor/gitignore/Clojure.gitignore

vendor/gitignore/Clojure.gitignore