Improve code design

app/controllers/projects/builds_controller.rb

@@ -49,18 +49,14 @@ class Projects::BuildsController < Projects::ApplicationController
   end
 
   def retry
-    unless @build.retryable?
-      return render_404
-    end
+    return render_404 unless @build.retryable?
 
     build = Ci::Build.retry(@build, current_user)
     redirect_to build_path(build)
   end
 
   def play
-    unless @build.playable?
-      return render_404
-    end
+    return render_404 unless @build.playable?
 
     build = @build.play(current_user)
     redirect_to build_path(build)

db/fixtures/development/14_builds.rb

 class Gitlab::Seeder::Builds
-  STAGES = %w(build notify_build test notify_test deploy notify_deploy)
+  STAGES = %w[build notify_build test notify_test deploy notify_deploy]
   
   def initialize(project)
     @project = project

doc/ci/yaml/README.md

@@ -530,7 +530,7 @@ The above script will:
 
 1. Execute `cleanup_build_job` only when `build_job` fails
 2. Always execute `cleanup_job` as the last step in pipeline
-3. Allow you to manually execute `deploy_job` form GitLab
+3. Allow you to manually execute `deploy_job` from GitLab
 
 #### Manual actions