Fix diffusion browse queries in git

Summary:
If you try to load a directory in diffusion in a git repo that has a readme
file and you don't include a trailing slash in the path, you get an error
because we don't assemble the full paths of files correctly. This fixes that.

Test Plan: load such a directory in diffusion and see no fatal

Reviewers: epriestley, vrana

Reviewed By: vrana

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3533

src/applications/diffusion/query/browse/DiffusionGitBrowseQuery.php

@@ -83,7 +83,7 @@ final class DiffusionGitBrowseQuery extends DiffusionBrowseQuery {
         }
       }
 
-      $result->setFullPath($path.$name);
+      $result->setFullPath(rtrim($path, '/').'/'.$name);
       $result->setPath($name);
       $result->setHash($hash);
       $result->setFileType($file_type);