[master] f572337 Safer printf usage

[Dridi Boukelmoune]

commit f57233760788c91a287584305ae296885878d65b
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed Dec 7 15:55:15 2016 +0100

    Safer printf usage

diff --git a/tools/vtest.sh b/tools/vtest.sh
index b284e35..6e1d8ca 100755
--- a/tools/vtest.sh
+++ b/tools/vtest.sh
@@ -79,7 +79,7 @@ makedistcheck () (
 failedtests () (
 	for t in `grep '^FAIL: tests/' ${1} | sort -u | sed 's/.* //'`
 	do
-		printf "VTCGITREV ${t} "
+		printf 'VTCGITREV %s ' "${t}"
 		(
 			cd varnish-cache/bin/varnishtest/
 			git log -n 1 ${t} | head -1