Merge branch 'patch-10' into 'master'

Added recommendation to install github-markdown

See merge request !8103

app/views/projects/wikis/git_access.html.haml

@@ -17,6 +17,13 @@
     %pre.dark
       :preserve
         gem install gollum
+    %p
+      It is recommended to install
+      %code github-markdown
+      so that GFM features render locally:
+    %pre.dark
+      :preserve
+        gem install github-markdown
     %h3 Clone your wiki
     %pre.dark