test-lib-functions.sh: fix the second argument to some helper functions

The second argument to test_path_is_file and test_path_is_dir
must be $2 and not $*, which instead would repeat the file
name in the error message.

Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
Reviewed-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/test-lib-functions.sh

@@ -383,15 +383,15 @@ test_external_without_stderr () {
 test_path_is_file () {
 	if ! [ -f "$1" ]
 	then
-		echo "File $1 doesn't exist. $*"
+		echo "File $1 doesn't exist. $2"
 		false
 	fi
 }
 
 test_path_is_dir () {
 	if ! [ -d "$1" ]
 	then
-		echo "Directory $1 doesn't exist. $*"
+		echo "Directory $1 doesn't exist. $2"
 		false
 	fi
 }