Merge branch 'rubycop-improvements' into 'master'

.rubocop.yml

app/controllers/namespaces_controller.rb

app/controllers/projects/blob_controller.rb

app/controllers/projects/raw_controller.rb

app/controllers/projects/refs_controller.rb

app/controllers/projects/wikis_controller.rb

app/finders/notes_finder.rb

app/finders/snippets_finder.rb

app/helpers/application_helper.rb

app/helpers/commits_helper.rb

app/helpers/notes_helper.rb

app/helpers/projects_helper.rb

app/helpers/tab_helper.rb

app/models/application_setting.rb

app/models/commit.rb

app/models/namespace.rb

app/models/project.rb

app/models/project_services/bamboo_service.rb

app/models/project_services/teamcity_service.rb

app/models/snippet.rb