branch: trivial style fix

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/branch.c b/branch.c
index c5c6984..546c4b4 100644
--- a/branch.c
+++ b/branch.c
@@ -307,7 +307,7 @@
 			 start_name);
 
 	if (real_ref && track)
-		setup_tracking(ref.buf+11, real_ref, track, quiet);
+		setup_tracking(ref.buf + 11, real_ref, track, quiet);
 
 	if (!dont_change_ref)
 		if (write_ref_sha1(lock, sha1, msg) < 0)