Merge branch 'rouge-3.3.0' into 'master'

Update to Rouge 3.3.0 including frozen string literals for improved memory usage

See merge request gitlab-org/gitlab-ce!22035

Gemfile.lock

@@ -729,7 +729,7 @@ GEM
     retriable (3.1.2)
     rinku (2.0.0)
     rotp (2.1.2)
-    rouge (3.2.1)
+    rouge (3.3.0)
     rqrcode (0.7.0)
       chunky_png
     rqrcode-rails3 (0.1.7)

Gemfile.rails5.lock

@@ -738,7 +738,7 @@ GEM
     retriable (3.1.2)
     rinku (2.0.0)
     rotp (2.1.2)
-    rouge (3.2.1)
+    rouge (3.3.0)
     rqrcode (0.7.0)
       chunky_png
     rqrcode-rails3 (0.1.7)

changelogs/unreleased/rouge-3-3-0.yml

+---
+title: Update to Rouge 3.3.0 including frozen string literals for improved memory
+  usage
+merge_request:
+author:
+type: changed