Move some methods from ApplicationHelper to MarkupHelper

app/helpers/application_helper.rb

@@ -196,38 +196,6 @@ module ApplicationHelper
     end
   end
-  def render_markup(file_name, file_content)
-    if gitlab_markdown?(file_name)
-      Hamlit::RailsHelpers.preserve(markdown(file_content))
-    elsif asciidoc?(file_name)
-      asciidoc(file_content)
-    elsif plain?(file_name)
-      content_tag :pre, class: 'plain-readme' do
-        file_content
-      end
-    else
-      other_markup(file_name, file_content)
-    end
-  rescue RuntimeError
-    simple_format(file_content)
-  end
-
-  def plain?(filename)
-    Gitlab::MarkupHelper.plain?(filename)
-  end
-
-  def markup?(filename)
-    Gitlab::MarkupHelper.markup?(filename)
-  end
-
-  def gitlab_markdown?(filename)
-    Gitlab::MarkupHelper.gitlab_markdown?(filename)
-  end
-
-  def asciidoc?(filename)
-    Gitlab::MarkupHelper.asciidoc?(filename)
-  end
-
   def promo_host
     'about.gitlab.com'
   end

app/helpers/markup_helper.rb

 require 'nokogiri'
 module MarkupHelper
+  def plain?(filename)
+    Gitlab::MarkupHelper.plain?(filename)
+  end
+
+  def markup?(filename)
+    Gitlab::MarkupHelper.markup?(filename)
+  end
+
+  def gitlab_markdown?(filename)
+    Gitlab::MarkupHelper.gitlab_markdown?(filename)
+  end
+
+  def asciidoc?(filename)
+    Gitlab::MarkupHelper.asciidoc?(filename)
+  end
+
   # Use this in places where you would normally use link_to(gfm(...), ...).
   #
   # It solves a problem occurring with nested links (i.e.
@@ -110,6 +126,22 @@ module MarkupHelper
     end
   end
+  def render_markup(file_name, file_content)
+    if gitlab_markdown?(file_name)
+      Hamlit::RailsHelpers.preserve(markdown(file_content))
+    elsif asciidoc?(file_name)
+      asciidoc(file_content)
+    elsif plain?(file_name)
+      content_tag :pre, class: 'plain-readme' do
+        file_content
+      end
+    else
+      other_markup(file_name, file_content)
+    end
+  rescue RuntimeError
+    simple_format(file_content)
+  end
+
   # Returns the text necessary to reference `entity` across projects
   #
   # project - Project to reference

spec/helpers/markup_helper_spec.rb

 require 'spec_helper'
 describe MarkupHelper do
-  include ApplicationHelper
-
   let!(:project) { create(:project, :repository) }
   let(:user)          { create(:user, username: 'gfm') }