Wrap against 80 chars and rename failed_or_canceled

to better reflect the status. Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7508#note_18858398

app/models/ci/pipeline.rb

@@ -169,14 +169,16 @@ module Ci
     end
 
     def cancel_running
-      Gitlab::OptimisticLocking.retry_lock(statuses.cancelable) do |cancelable|
+      Gitlab::OptimisticLocking.retry_lock(
+        statuses.cancelable) do |cancelable|
           cancelable.each(&:cancel)
         end
     end
 
     def retry_failed(user)
-      Gitlab::OptimisticLocking.retry_lock(builds.latest.failed_or_canceled) do |failed|
-        failed.select(&:retryable?).each do |build|
+      Gitlab::OptimisticLocking.retry_lock(
+        builds.latest.failed_or_canceled) do |failed_or_canceled|
+          failed_or_canceled.select(&:retryable?).each do |build|
             Ci::Build.retry(build, user)
           end
         end