Bug: https://gitlab.com/gitlab-org/gitlab-ce/issues/2814

Index: gitlab/Gemfile
===================================================================
--- gitlab.orig/Gemfile
+++ gitlab/Gemfile
@@ -104,7 +104,7 @@ gem 'deckar01-task_list', '1.0.5', requi
 gem 'gitlab-markup',      '~> 1.5.0'
 gem 'redcarpet',          '~> 3.3.3'
 gem 'RedCloth',           '~> 4.3.2'
-gem 'rdoc',               '~>3.6'
+gem 'rdoc',               '~> 4.1'
 gem 'org-ruby',           '~> 0.9.12'
 gem 'creole',             '~> 0.5.0'
 gem 'wikicloth',          '0.8.1'