help: invalid pattern in Python 3.11

[dgw]

The old built-in help plugin uses a global regex flag in the middle of a pattern, which is no longer allowed as of Python 3.11:

sopel/sopel/modules/help.py

Line 246 in 81b5e11

@plugin.rule('$nick' r'(?i)(help|doc) +([A-Za-z]+)(?:\?+)?$')

Doing this was deprecated in Python 3.6 (scroll to re header, if the link fragment breaks).

The workaround is to install sopel-help from PyPI.

It is an official replacement, extracted from the core bot package and released separately for easier updates. We intend to keep it usable with the older 7.1.x Sopel versions until Sopel 8 is released.

This issue was opened after the offending code had already been removed from Sopel 8, so it could be pinned to the top of our issue list in case anyone had this problem.