ci: fix bashshell lint

templates/gitlab-ci-maven.yml

@@ -315,7 +315,7 @@ stages:
         _cond_val=$(echo "$_cond_val" | tr '[:punct:]' '_')
         # retrieve comparison value
         _cmp_val_prefix="scoped__${_target_var}__${_condition}__${_cond_var}__${_test_op}__"
-        _cmp_val=${_scoped_var#$_cmp_val_prefix}
+        _cmp_val=${_scoped_var#"$_cmp_val_prefix"}
         # manage 'ignore case'
         if [[ "$_test_op" == *_ic ]]
         then