check opts quoting

.gitlab-ci.yml

 variables:
-  OPTS: '1 2 "3 4" -- \ test'
+  OPTS: '1 2 \"3 4\" -- \\ test'
 
 
 test:
   script:
     - sh -c 'set -- $OPTS; for opt in "$@"; do echo "$opt"; done'
+    - set $OPTS
+    - for opt in "$@"; do echo "$opt"; done
 
 
 .files: