Regression: Complex factor conditions (including negative factor conditions) completely omitted from recent (v4?) docs #3276
Description
Issue
From https://tox.wiki/en/3.27.1/config.html#complex-factor-conditions :
Sometimes you need to specify the same line for several factors or create a special case for a combination of factors. ... They have all been added only to help demonstrate the following:
* how factor expressions get expanded the same way as in envlist
* how to use negated factor conditions by prefixing negated factors with !
* that the order in which factors are hyphenated together does not matter
An equivalent section seems to be completely absent from https://tox.wiki/en/latest/