Correct the comment above the Project.markdown_reference_pattern method

app/models/project.rb

@@ -460,8 +460,8 @@ class Project < ActiveRecord::Base
       '>'
     end
 
-    # Pattern used to extract `project>` project references from text
-    # (?!\w) matches any non-word character
+    # Pattern used to extract `namespace/project>` project references from text.
+    # (?!\w) matches any non-word character.
     # '>' or its escaped form ('&gt;') are checked for because '>' is sometimes escaped
     # when the reference comes from an external source.
     def markdown_reference_pattern