Merge branch 'feature.rouge-20' into 'master'

Upgrade to Rouge 2.0

## What does this MR do?

This MR is a refactor of the HTMLGitlab formatter. The original was copy-pasted from the legacy HTML formatter and adapted to suit our needs. In particular, this MR:

* Strips dead code and unused options
* Factors out the "wrapping" into the places that care about it - Bonzai and the view helpers
* Uses the Rouge 2.0 `token_lines` method to split tokens into lines, removing the custom code we used to do the same
* Uses the now-public `span` method instead of re-implementing it ourselves
* Removes options to not split into lines - the places where this feature wasn't being used are now using the plain `Formatters::HTML` instead of this class

See merge request !4691

1 files changed, 3 insertions, 6 deletions

diff --git a/app/helpers/blob_helper.rb b/app/helpers/blob_helper.rb
index 428a42266d0..abe115d8c68 100644
--- a/app/helpers/blob_helper.rb
+++ b/app/helpers/blob_helper.rb
@@ -1,10 +1,7 @@
 module BlobHelper
-  def highlighter(blob_name, blob_content, repository: nil, nowrap: false)
-    Gitlab::Highlight.new(blob_name, blob_content, nowrap: nowrap, repository: repository)
-  end
-
-  def highlight(blob_name, blob_content, repository: nil, nowrap: false, plain: false)
-    Gitlab::Highlight.highlight(blob_name, blob_content, nowrap: nowrap, plain: plain, repository: repository)
+  def highlight(blob_name, blob_content, repository: nil, plain: false)
+    highlighted = Gitlab::Highlight.highlight(blob_name, blob_content, plain: plain, repository: repository)
+    raw %(<pre class="code highlight"><code>#{highlighted}</code></pre>)
   end
 
   def no_highlight_files