Enable Style/SpaceAroundEqualsInParameterDefault cop

.rubocop.yml

.rubocop_todo.yml

app/controllers/registrations_controller.rb

app/helpers/explore_helper.rb

app/helpers/search_helper.rb

app/models/merge_request_diff.rb

app/models/repository.rb

lib/gitlab/ldap/access.rb

lib/gitlab/ldap/adapter.rb

lib/gitlab/popen.rb

lib/gitlab/redis.rb

spec/requests/git_http_spec.rb

spec/support/select2_helper.rb