Fix minor formatting style nit in PushQueue

Signed-off-by: Shawn O. Pearce <sop@google.com>
diff --git a/src/main/java/com/google/gerrit/git/PushQueue.java b/src/main/java/com/google/gerrit/git/PushQueue.java
index 28d0902..620db86 100644
--- a/src/main/java/com/google/gerrit/git/PushQueue.java
+++ b/src/main/java/com/google/gerrit/git/PushQueue.java
@@ -160,7 +160,7 @@
     } finally {
       try {
         tn.close();
-      } catch (Throwable e2){
+      } catch (Throwable e2) {
         log.warn("Unexpected error while closing " + op.uri, e2);
       }
     }