Fix static-analysis offenses

lib/ci/gitlab_ci_yaml_processor.rb

@@ -229,7 +229,7 @@ module Ci
     end
 
     def source_to_pattern(source)
-      return source if ['api', 'external', 'web'].include? source
+      return source if %w(api external web).include? source
       return source.pluralize
     end
   end

spec/lib/ci/gitlab_ci_yaml_processor_spec.rb

@@ -394,12 +394,12 @@ module Ci
         end
 
         it "does not return builds if except has special keywords specified and source matches" do
-          possibilities = [{keyword: 'pushes', source: 'push'},
-                           {keyword: 'web', source: 'web'},
-                           {keyword: 'triggers', source: 'trigger'},
-                           {keyword: 'schedules', source: 'schedule'},
-                           {keyword: 'api', source: 'api'},
-                           {keyword: 'external', source: 'external'}]
+          possibilities = [{ keyword: 'pushes', source: 'push' },
+                           { keyword: 'web', source: 'web' },
+                           { keyword: 'triggers', source: 'trigger' },
+                           { keyword: 'schedules', source: 'schedule' },
+                           { keyword: 'api', source: 'api' },
+                           { keyword: 'external', source: 'external' }]
 
           possibilities.each do |possibility|
             config = YAML.dump({