Gives traceback on multi-document yaml files

[abentley]

$ printf -- '---\na: b\n---'|yaml2jsonnet -
Traceback (most recent call last):
  File "/home/abentley/.local/bin/yaml2jsonnet", line 8, in <module>
    sys.exit(main())
  File "/home/abentley/.local/lib/python3.8/site-packages/yaml2jsonnet/cli.py", line 58, in main
    run(args)
  File "/home/abentley/.local/lib/python3.8/site-packages/yaml2jsonnet/cli.py", line 47, in run
    convert_yaml(yaml_data, args.out, args.document_comments)
  File "/home/abentley/.local/lib/python3.8/site-packages/yaml2jsonnet/yaml2jsonnet.py", line 14, in convert_yaml
    JsonnetRenderer(events, output, array, inject_comments).render()
  File "/home/abentley/.local/lib/python3.8/site-packages/yaml2jsonnet/jsonnet_renderer.py", line 210, in render
    self.state.send(event)
  File "/home/abentley/.local/lib/python3.8/site-packages/yaml2jsonnet/jsonnet_renderer.py", line 284, in _stream
    raise MultipleDocumentsError(self, event)
yaml2jsonnet.jsonnet_renderer.MultipleDocumentsError: Expecting a single document but got multiple: Last event was DocumentStartEvent(), the state was _stream, the queue was [(StreamStartEvent,_start)]

I think even "Expecting a single document but got multiple" without the rest would be fine.

[ghostsquad]

ya, it would be nice to just have this be returned as an array