pull: remove extra space from reflog message

When executing "git pull" with no arguments, the reflog message was:
  "pull : Fast-forward"

Signed-off-by: Ori Avtalion <ori@avtalion.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-pull.sh b/git-pull.sh
index fb9e2df..28441ac 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -9,7 +9,7 @@
 SUBDIRECTORY_OK=Yes
 OPTIONS_SPEC=
 . git-sh-setup
-set_reflog_action "pull $*"
+set_reflog_action "pull${1+ $*}"
 require_work_tree
 cd_to_toplevel