Merge branch 'pt/pull-log-n' into maint

"git pull --log" and "git pull --no-log" worked as expected, but
"git pull --log=20" did not.

* pt/pull-log-n:
  pull: handle --log=<n>

Author: gitster

git-pull.sh

@@ -84,8 +84,8 @@ do
 		diffstat=--no-stat ;;
 	--stat|--summary)
 		diffstat=--stat ;;
-	--log|--no-log)
-		log_arg=$1 ;;
+	--log|--log=*|--no-log)
+		log_arg="$1" ;;
 	--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
 		no_commit=--no-commit ;;
 	--c|--co|--com|--comm|--commi|--commit)

t/t5524-pull-msg.sh

@@ -17,6 +17,9 @@ test_expect_success setup '
 		git commit -m "add bfile"
 	) &&
 	test_tick && test_tick &&
+	echo "second" >afile &&
+	git add afile &&
+	git commit -m "second commit" &&
 	echo "original $dollar" >afile &&
 	git add afile &&
 	git commit -m "do not clobber $dollar signs"
@@ -32,4 +35,18 @@ test_expect_success pull '
 )
 '
 
+test_expect_success '--log=1 limits shortlog length' '
+(
+	cd cloned &&
+	git reset --hard HEAD^ &&
+	test "$(cat afile)" = original &&
+	test "$(cat bfile)" = added &&
+	git pull --log=1 &&
+	git log -3 &&
+	git cat-file commit HEAD >result &&
+	grep Dollar result &&
+	! grep "second commit" result
+)
+'
+
 test_done