nixos/virtualization: fix shellcheck login

fixes https://www.shellcheck.net/wiki/SC2002

Signed-off-by: Florian Brandes <florian.brandes@posteo.de>

Changed files
+1 -2
nixos
modules
virtualisation
+1 -2
nixos/modules/virtualisation/oci-containers.nix
···
text = ''
${cfg.backend} rm -f ${name} || true
${optionalString (isValidLogin container.login) ''
-
cat ${container.login.passwordFile} | \
${cfg.backend} login \
${container.login.registry} \
--username ${container.login.username} \
-
--password-stdin
+
--password-stdin < ${container.login.passwordFile}
''}
${optionalString (container.imageFile != null) ''
${cfg.backend} load -i ${container.imageFile}