Fix an issue where repositories with hyphens could sort improperly in typeaheads

Summary: Fixes T12894. See that task for discussion.

Test Plan:
  - Created repositories `abcdef`, then `abcdef-a` through `abcdef-f`.
  - Before patch, awkward sort order.
  - After patch, query for `abcdef` hits `abcdef` first.
  - See T12894 for details and screenshots.

Reviewers: chad, amckinley

Reviewed By: chad

Maniphest Tasks: T12894

Differential Revision: https://secure.phabricator.com/D18179

src/applications/diffusion/typeahead/DiffusionRepositoryDatasource.php

@@ -54,7 +54,7 @@ final class DiffusionRepositoryDatasource
         $parts[] = $monogram;
       }
 
-      $name = implode(' ', $parts);
+      $name = implode("\n", $parts);
 
       $vcs = $repository->getVersionControlSystem();
       $vcs_type = PhabricatorRepositoryType::getNameForRepositoryType($vcs);