Correct key name usage in the previous commit

src/applications/differential/conduit/ConduitAPI_differential_getcommitmessage_Method.php

@@ -140,7 +140,7 @@ final class ConduitAPI_differential_getcommitmessage_Method
             array("\r\n", "\r"),
             array("\n",   "\n"),
             $value);
-          if ($key === 'summary') {
+          if ($key === 'differential:summary') {
             $commit_message[] = "{$value}";
           } else if (strpos($value, "\n") !== false || substr($value, 0, 2) === '  ') {
             $commit_message[] = "{$label}:\n{$value}";