`:not()` has supported selector lists since bug 933562, so `:not(:is(X, Y, Z))` can now just be `:not(X, Y, Z)` for simplicity.
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`:not()` has supported selector lists since bug 933562, so `:not(:is(X, Y, Z))` can now just be `:not(X, Y, Z)` for simplicity. https://searchfox.org/mozilla-central/search?q=%3Anot%28%3Ais&path=&case=false®exp=false