Merge pull request #20 from common-workflow-language/tag-last-code-block

one last code block to tag

Author: mr-c

_episodes/03-input.md

@@ -31,6 +31,7 @@ types and appearing on the command line in different ways:
 ~~~
 {% include cwl/inp.cwl %}
 ~~~
+{: .source}
 
 *inp-job.yml*