-----
- Exception tracebacks for several known-cases are printed in a shortened
format. A new option, ``--traceback-mode`` can be used to request long traces,
as in ``--traceback-mode full``
- For schemas which do not include ``$id``, the schema URI will be used for
``$ref`` resolution. This applies to HTTP(S) schema URI as well as to local
paths. Thanks to :user:`dkolepp` for the bug report and contributions!