pretty-xml/PrettyXMLSerializer serializer plugin missing

[kwisatz]

The PrettyXMLSerializer, despite being mentioned in the documentation as available in default RDFLib for version 7.1.1, is missing from it.

(venv) kwisatz@alai:~/project - main $ pip3 show rdflib
Name: rdflib
Version: 7.1.1

Error:

rdflib.plugin.PluginException: No plugin registered for (pretty-xml, <class 'rdflib.parser.Parser'>)

and

Traceback (most recent call last):
  File "/home/kwisatz/.virtualenvs/ludap/lib/python3.11/site-packages/rdflib/plugin.py", line 134, in get
    p: Plugin[PluginT] = _plugins[(name, kind)]
                         ~~~~~~~~^^^^^^^^^^^^^^
KeyError: ('pretty-xml', <class 'rdflib.parser.Parser'>)

The documentation does not mention in any way that some serializer plug-ins would need to be registered manually.

[kwisatz]

I have found that the same is true for e.g. the longturtle format/serializer.