[PATCH] qf: fix shellcheck warning

[Jani Nikula]

In qf line 411:
git reset --hard $(git rev-parse --abbrev-ref @{u})
 ^-- SC1083: This { is literal. Check expression (missing ;/\n?) or quote it.
 ^-- SC1083: This } is literal. Check expression (missing ;/\n?) or quote it.

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Fixes: 0db9811183aa ("qf: Make qf_pull -f forcibly clean")
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 qf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qf b/qf
index 6dcf26970726..d1499ada1951 100755
--- a/qf
+++ b/qf
@@ -408,7 +408,7 @@ function qf_pull
 	cd patches
 
 	if [[ $FORCE ]]; then
-		git reset --hard $(git rev-parse --abbrev-ref @{u})
+		git reset --hard $(git rev-parse --abbrev-ref "@{u}")
 		quiet_pop_all -f
 	else
 		git pull --ff-only
-- 
2.11.0