Add parenthesis to function def with arguments.

app/controllers/application_controller.rb

app/controllers/registrations_controller.rb

app/helpers/events_helper.rb

app/helpers/issues_helper.rb

app/helpers/merge_requests_helper.rb

app/helpers/profile_helper.rb

app/helpers/projects_helper.rb

app/helpers/tab_helper.rb

app/helpers/tags_helper.rb

app/helpers/tree_helper.rb

app/models/ability.rb

app/models/commit.rb

app/models/concerns/mentionable.rb

app/models/members/project_member.rb

app/models/namespace.rb

app/models/network/graph.rb

app/models/project.rb

app/models/project_services/gitlab_ci_service.rb

app/models/project_team.rb

app/models/user.rb