Don't try to highlight 11 in Remarkup

Test Plan: 11

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5181

src/applications/diffusion/remarkup/DiffusionRemarkupRule.php

@@ -12,9 +12,9 @@ final class DiffusionRemarkupRule
     $min_qualified   = PhabricatorRepository::MINIMUM_QUALIFIED_HASH;
 
     return
-      '(?:r[A-Z]+)?[0-9]+'.
+      'r[A-Z]+[1-9]\d*'.
       '|'.
-      '(?:r[A-Z]+)?[a-f0-9]{'.$min_qualified.',40}'.
+      'r[A-Z]+[a-f0-9]{'.$min_qualified.',40}'.
       '|'.
       '[a-f0-9]{'.$min_unqualified.',40}';
   }