Ignore references in blockquotes.

lib/gitlab/markdown/reference_filter.rb

@@ -25,12 +25,18 @@ module Gitlab
         ERB::Util.html_escape_once(html)
       end
 
+      def ignore_parents
+        @ignore_parents ||= begin
           # Don't look for references in text nodes that are children of these
           # elements.
-      IGNORE_PARENTS = %w(pre code a style).to_set
+          parents = %w(pre code a style)
+          parents << 'blockquote' if context[:ignore_blockquotes]
+          parents.to_set
+        end
+      end
 
       def ignored_ancestry?(node)
-        has_ancestor?(node, IGNORE_PARENTS)
+        has_ancestor?(node, ignore_parents)
       end
 
       def project

lib/gitlab/reference_extractor.rb

@@ -48,7 +48,8 @@ module Gitlab
         project: project,
         current_user: current_user,
         # We don't actually care about the links generated
-        only_path: true
+        only_path: true,
+        ignore_blockquotes: true
       }
 
       pipeline = HTML::Pipeline.new([filter], context)

spec/lib/gitlab/reference_extractor_spec.rb

@@ -32,6 +32,10 @@ describe Gitlab::ReferenceExtractor do
       ```
       @bar
       ```
+
+      Quote: 
+
+      > @offteam
     })
     expect(subject.users).to eq([])
   end