:where() wrong selector minimalization

[kartofelek007]

css like:

:where(.title p) {}
:where(.subpage h2) {}
:where(.subpage :is(h1,h2,h3,h4,h5,h6)) {}

is "clean" to:

:where(.titlep) {}
:where(.subpageh2) {}
:where(.subpage:is(h1,h2,h3,h4,h5,h6)) {}