Fix Style/Blocks cop violations

spec/controllers/branches_controller_spec.rb

spec/controllers/import/bitbucket_controller_spec.rb

spec/controllers/import/github_controller_spec.rb

spec/controllers/import/gitlab_controller_spec.rb

spec/features/issues_spec.rb

spec/helpers/tree_helper_spec.rb

spec/lib/disable_email_interceptor_spec.rb

spec/lib/file_size_validator_spec.rb

spec/lib/gitlab/backend/grack_auth_spec.rb

spec/lib/gitlab/bitbucket_import/project_creator_spec.rb

spec/lib/gitlab/github_import/project_creator_spec.rb

spec/lib/gitlab/gitlab_import/project_creator_spec.rb

spec/lib/gitlab/google_code_import/importer_spec.rb

spec/lib/gitlab/google_code_import/project_creator_spec.rb

spec/lib/gitlab/o_auth/auth_hash_spec.rb

spec/lib/gitlab/satellite/action_spec.rb

spec/lib/gitlab/satellite/merge_action_spec.rb

spec/mailers/notify_spec.rb

spec/models/deploy_keys_project_spec.rb

spec/models/hooks/service_hook_spec.rb