Revert unnecesarry changes

app/models/ci/build.rb

@@ -176,9 +176,12 @@ module Ci
     #   * Lowercased
     #   * Anything not matching [a-z0-9-] is replaced with a -
     #   * Maximum length is 63 bytes
+    #   * First/Last Character is not a hyphen
     def ref_slug
-      slugified = ref.to_s.downcase
-      slugified.gsub(/[^a-z0-9]/, '-')[0..62]
+      ref.to_s
+          .downcase
+          .gsub(/[^a-z0-9]/, '-')[0..62]
+          .gsub(/(\A-+|-+\z)/, '')
     end
 
     # Variables whose value does not depend on environment

spec/models/ci/build_spec.rb

@@ -1004,7 +1004,11 @@ describe Ci::Build, :models do
       'fix-1-foo'             => 'fix-1-foo',
       'a' * 63                => 'a' * 63,
       'a' * 64                => 'a' * 63,
-      'FOO'       => 'foo'
+      'FOO'                   => 'foo',
+      '-' + 'a' * 61 + '-'    => 'a' * 61,
+      '-' + 'a' * 62 + '-'    => 'a' * 62,
+      '-' + 'a' * 63 + '-'    => 'a' * 62,
+      'a' * 62 + ' '          => 'a' * 62
     }.each do |ref, slug|
       it "transforms #{ref} to #{slug}" do
         build.ref = ref

spec/support/matchers/access_matchers_for_controller.rb

@@ -65,7 +65,7 @@ module AccessMatchersForController
   end
 
   matcher :be_allowed_for do |role|
-    match do |action, &block|
+    match do |action|
       user = emulate_user(role, @membership)
       update_owner(@objects, user)
       action.call