Fix a condition in role of CI tests

tests/roles/custom-test-fonts/tasks/main.yml

@@ -2,7 +2,7 @@
 
 - block:
   - name: language coverage
-    script: run-lang-coverage-test --lang "{{ item }}" --path "{{ path_prefix }}" --artifactsdir "{{ remote_artifacts }}" {{ "" if coverage.values is not defined and coverage[item].ignore is not defined else "--ignore " + (coverage[item].ignore | join('--ignore ')) }}
+    script: run-lang-coverage-test --lang "{{ item }}" --path "{{ path_prefix }}" --artifactsdir "{{ remote_artifacts }}" {{ "" if coverage.values is not defined or coverage[item].ignore is not defined else "--ignore " + (coverage[item].ignore | join('--ignore ')) }}
     with_items:
     - "{{ coverage if coverage.keys is not defined else coverage.keys()|list }}"
   - name: generic family assignment