Remove curly braces around line count.

Summary:
I'm assuming they aren't meant to be there.

Old:
This file has a very large number of changes ({4,032} lines). Show File Contents

New:
This file has a very large number of changes (4,032 lines). Show File Contents

Test Plan:
Saved a 5000-line test file, diffed from /dev/null, uploaded diff to local
instance, viewed.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4462

src/applications/differential/parser/DifferentialChangesetParser.php

@@ -745,7 +745,7 @@ final class DifferentialChangesetParser {
         $lines = number_format($this->changeset->getAffectedLineCount());
         $shield = $renderer->renderShield(
           pht(
-            'This file has a very large number of changes ({%s} lines).',
+            'This file has a very large number of changes (%s lines).',
             $lines));
       }
     }