[csswg-drafts] Pull Request: [mediaqueries-4] More explicit clarification for when any-* 'none' evaluates to true

patrickhlauke has just submitted a new pull request for 
https://github.com/w3c/csswg-drafts:

== [mediaqueries-4] More explicit clarification for when any-* 'none' 
evaluates to true ==
Adds more explicit clarification about the possibly non-intuitive way 
in
which `any-pointer:none`/`any-hover:none` work.

Splits out the initial mention (that "ALL pointing devices need to
match") into its own line, and provides two sets of notes/examples 
that
clarify scenarios where this may not be completely obvious.

Additionally, this explicitly highlights the situation that currently
cannot be detected: having more than one pointing device where at 
least
one is non-hover-capable (as touched on in
https://github.com/w3c/csswg-drafts/issues/737#issuecomment-269348418 
)

See https://github.com/w3c/csswg-drafts/pull/840