Merge branch 'ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g' of gitlab.com:gitlab-org/gitlab-ce into ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g

Merge commit '4c53cc0e' into ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g

* commit '4c53cc0e':
  rubocop satisfy

Conflicts:
	app/controllers/ci/builds_controller.rb
	app/controllers/ci/commits_controller.rb

Remove redundant navigation on commits and builds page

This reverts commit 6014019e.

Merge branch 'ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g' of gitlab.com:gitlab-org/gitlab-ce into ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Merge branch 'ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g' of gitlab.com:gitlab-org/gitlab-ce into ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g

Merge branch 'ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g' of gitlab.com:gitlab-org/gitlab-ce into ci-and-ce-sitting-in-a-tree-k-i-s-s-i-n-g

Syntax highlighting improvements

On the server side:

During development I would occasionally see SanitizationFilter sanitizing
the result of SyntaxHighlightFilter, even though its attributes were
whitelisted. This updates the `clean_spans` transformer to return the
whitelisted node as [suggested by the Sanitize docs](http://git.io/vZR8i).

On the client side:

- Makes the syntax_highlight JS more flexible
- Adds JS specs
- Simplifies highlighting of new notes
- Adds highlighting to Markdown preview

See merge request !1278

Add comments and clean up test for !1274

See merge request !1279

Bump rouge to 1.10.1 to remove warning noise and fix other syntax highlighting bugs

rouge warnings begone!

Closes #2128

Closes #2433

See merge request !1277