== should format pseudo class selectors ==

:root {}
:any-link {}
button:hover {}
div\:before {}
div\::before {}
iNpUt {}
:matches(section, article, aside, nav) h1 {}
input:not([type='submit']) {}
div.sidebar:has(*:nth-child(5)):not(:has(*:nth-child(6))) {}
::-webkit-scrollbar-thumb:window-inactive {}
::-webkit-scrollbar-button:horizontal:decrement {}
.test::-webkit-scrollbar-button:horizontal:decrement {}
*:is(*) {}
:--heading {}
a:-moz-placeholder {}
a:hover::before {}
div :nth-child(2) {}
a:hOvEr {}
:-webkit-full-screen a {}

:nth-child(odd) {}
:nth-child(ODD) {}
:nth-child(oDd) {}
:nth-child(even) {}
:nth-child(eVeN) {}
:nth-child(EVEN) {}
:nth-child(0){}
:nth-child(+0){}
:nth-child(-0){}
:nth-child(1){}
:nth-child(+1){}
:nth-child(-1){}
:nth-child(3){}
:nth-child(+3){}
:nth-child(-3){}

:not(p) {}
:not(   p   ) {}
:not(
p
) {}
button:not([DISABLED]) {}
*:not(FOO) {}
html|*:not(:link):not(:visited) {}
.selector:not(*:root) {}
:not(:is(argument)) {}
p:not(.fancy) {}
body :not(p) {}
body :not(div):not(span) {}
body :not(div, .fancy) {}
h2 :not(span.foo) {}
body > h2:not(:first-of-type):not(:last-of-type) {}
:not(em, strong#foo) {}
html|*:not(:link):not(:visited) {}
button:not([DISABLED]) {}
a:not(:hover) {}
a:where(:not(:hover)) {}
section:not(:has(h1, h2, h3, h4, h5, h6)) {}
section:has(:not(h1, h2, h3, h4, h5, h6)) {}
ul li:not(:first-of-type) {}
:not(:nth-child(6),
     :nth-last-child(6),
     :nth-of-type(6),
     :nth-last-of-type(6)) {}

:is(ul) li {}
:is(ul, ol) li {}
:is(header, main, footer) p:hover {}
div:is(.cool, .fun) {}
:is(ol, ul, menu, dir) :is(ol, ul, menu, dir) :is(ul, menu, dir) {}
*|*:is(:hover, :focus) {}
*|*:is(*:hover, *:focus) {}
:is(ul, ol, .list) > [hidden] {}
:is(p, p:unsupported) {}
:is(:valid, :unsupported) {}
a:is(:not(:hover)) {}
:is(section, article, aside, nav) :is(h1, h2, h3, h4, h5, h6) {}
:is(:nth-child(6),
    :nth-last-child(6),
    :nth-of-type(6),
    :nth-last-of-type(6)) {}

:where(ul) li {}
:where(ul, ol) li {}
:where(header, main, footer) p:hover {}
div:where(.cool, .fun) {}
:where(ol, ul, menu, dir) :where(ol, ul, menu, dir) :where(ul, menu, dir) {}
*|*:where(:hover, :focus) {}
*|*:where(*:hover, *:focus) {}
:where(ul, ol, .lwheret) > [hidden] {}
:where(p, p:unsupported) {}
:where(:valid, :unsupported) {}
a:where(:not(:hover)) {}
:where(:nth-child(6), :nth-child(6) #id){}
:where(:nth-last-child(7), :nth-last-child(7 ) #id){}
:where(:nth-of-type(8) #a, :nth-of-type(8) #b, :nth-of-type(8) #c) {}
:where(:nth-last-of-type(9)   #a,
       :nth-last-of-type(9 )  #b,
       :nth-last-of-type( 9)  #c,
       :nth-last-of-type( 9 ) #d,
       :nth-last-of-type(9)   #e) {}
:where(:nth-child(6),
       :nth-last-child(6),
       :nth-of-type(6),
       :nth-last-of-type(6)) {}

:matches(ul) li {}
:matches(ul, ol) li {}

:dir(ltr) {}
:dir(   ltr   ) {}
:dir(rtl) {}
:dir(   rtl   ) {}

:lang(\*-Latn) {}
:lang("*-Latn") {}
html:lang(fr-be) {}
html:lang(de) {}
html:lang(de, fr) {}
:lang(fr-be) > q {}
:lang(de) > q {}

:-webkit-any(textarea) {}
:-moz-any(textarea) {}
:-webkit-any(header, main, footer) p:hover {}
:-moz-any(header, main, footer) p:hover {}
:-webkit-any(.class[test]) {}
:-moz-any(.class[test]) {}
:-webkit-any(.class[test], .class) {}
:-moz-any(.class[test], .class) {}
:-webkit-any(h1),
:-webkit-any( #div1, b ),
:-webkit-any(.foo, #bar),
:-webkit-any(i,p,:link,span:focus) {}
#test-last-child :-webkit-any(:last-child),
:-webkit-any(:link:focus),
#container-div :-webkit-any(:link, :not(a)),
h1:-webkit-any(.h1class, #bar) {}

:current(p, li, dt, dd) {}
:past(p, li, dt, dd) {}
:future(p, li, dt, dd) {}

:host(.special-custom-element) {}
:host(   .special-custom-element   ) {}
:host(.footer) {}
:host {}
:host-context(h1) {}
:host-context(   h1   ) {}

:unknown {}
:unknown() {}
:unknown(foo) {}
:unknown(foo bar) {}
:unknown(foo, bar) {}
:unknown([foo]) {}
:unknown((foo bar)) {}
:unknown(((foo bar))) {}
:unknown({foo: bar}) {}
:unknown({{foo: bar}}) {}
:unknown({foo: bar !important}) {}
:unknown("string") {}
:unknown("string", foo) {}
:unknown('string') {}
:unknown(url(foo.png)) {}
:unknown({!}) {}
:unknown(!) {}
:unknown({;}) {}
:unknown(;) {}

[expect]
:root {}

:any-link {}

button:hover {}

div\:before {}

div\::before {}

iNpUt {}

:matches(section, article, aside, nav) h1 {}

input:not([type="submit"]) {}

div.sidebar:has(*:nth-child(5)):not(:has(*:nth-child(6))) {}

::-webkit-scrollbar-thumb:window-inactive {}

::-webkit-scrollbar-button:horizontal:decrement {}

.test::-webkit-scrollbar-button:horizontal:decrement {}

*:is(*) {}

:--heading {}

a:-moz-placeholder {}

a:hover::before {}

div :nth-child(2) {}

a:hOvEr {}

:-webkit-full-screen a {}

:nth-child(odd) {}

:nth-child(ODD) {}

:nth-child(oDd) {}

:nth-child(even) {}

:nth-child(eVeN) {}

:nth-child(EVEN) {}

:nth-child(0) {}

:nth-child(+0) {}

:nth-child(-0) {}

:nth-child(1) {}

:nth-child(+1) {}

:nth-child(-1) {}

:nth-child(3) {}

:nth-child(+3) {}

:nth-child(-3) {}

:not(p) {}

:not(p) {}

:not(p) {}

button:not([DISABLED]) {}

*:not(FOO) {}

html|*:not(:link):not(:visited) {}

.selector:not(*:root) {}

:not(:is(argument)) {}

p:not(.fancy) {}

body :not(p) {}

body :not(div):not(span) {}

body :not(div, .fancy) {}

h2 :not(span.foo) {}

body > h2:not(:first-of-type):not(:last-of-type) {}

:not(em, strong#foo) {}

html|*:not(:link):not(:visited) {}

button:not([DISABLED]) {}

a:not(:hover) {}

a:where(:not(:hover)) {}

section:not(:has(h1, h2, h3, h4, h5, h6)) {}

section:has(:not(h1, h2, h3, h4, h5, h6)) {}

ul li:not(:first-of-type) {}

:not(:nth-child(6), :nth-last-child(6), :nth-of-type(6), :nth-last-of-type(6)) {}

:is(ul) li {}

:is(ul, ol) li {}

:is(header, main, footer) p:hover {}

div:is(.cool, .fun) {}

:is(ol, ul, menu, dir) :is(ol, ul, menu, dir) :is(ul, menu, dir) {}

*|*:is(:hover, :focus) {}

*|*:is(*:hover, *:focus) {}

:is(ul, ol, .list) > [hidden] {}

:is(p, p:unsupported) {}

:is(:valid, :unsupported) {}

a:is(:not(:hover)) {}

:is(section, article, aside, nav) :is(h1, h2, h3, h4, h5, h6) {}

:is(:nth-child(6), :nth-last-child(6), :nth-of-type(6), :nth-last-of-type(6)) {}

:where(ul) li {}

:where(ul, ol) li {}

:where(header, main, footer) p:hover {}

div:where(.cool, .fun) {}

:where(ol, ul, menu, dir) :where(ol, ul, menu, dir) :where(ul, menu, dir) {}

*|*:where(:hover, :focus) {}

*|*:where(*:hover, *:focus) {}

:where(ul, ol, .lwheret) > [hidden] {}

:where(p, p:unsupported) {}

:where(:valid, :unsupported) {}

a:where(:not(:hover)) {}

:where(:nth-child(6), :nth-child(6) #id) {}

:where(:nth-last-child(7), :nth-last-child(7) #id) {}

:where(:nth-of-type(8) #a, :nth-of-type(8) #b, :nth-of-type(8) #c) {}

:where(:nth-last-of-type(9) #a, :nth-last-of-type(9) #b, :nth-last-of-type(9) #c, :nth-last-of-type(9) #d,
:nth-last-of-type(9) #e) {}

:where(:nth-child(6), :nth-last-child(6), :nth-of-type(6), :nth-last-of-type(6)) {}

:matches(ul) li {}

:matches(ul, ol) li {}

:dir(ltr) {}

:dir(ltr) {}

:dir(rtl) {}

:dir(rtl) {}

:lang(\*-Latn) {}

:lang("*-Latn") {}

html:lang(fr-be) {}

html:lang(de) {}

html:lang(de, fr) {}

:lang(fr-be) > q {}

:lang(de) > q {}

:-webkit-any(textarea) {}

:-moz-any(textarea) {}

:-webkit-any(header, main, footer) p:hover {}

:-moz-any(header, main, footer) p:hover {}

:-webkit-any(.class[test]) {}

:-moz-any(.class[test]) {}

:-webkit-any(.class[test], .class) {}

:-moz-any(.class[test], .class) {}

:-webkit-any(h1),
:-webkit-any(#div1, b),
:-webkit-any(.foo, #bar),
:-webkit-any(i, p, :link, span:focus) {}

#test-last-child :-webkit-any(:last-child),
:-webkit-any(:link:focus),
#container-div :-webkit-any(:link, :not(a)),
h1:-webkit-any(.h1class, #bar) {}

:current(p, li, dt, dd) {}

:past(p, li, dt, dd) {}

:future(p, li, dt, dd) {}

:host(.special-custom-element) {}

:host(.special-custom-element) {}

:host(.footer) {}

:host {}

:host-context(h1) {}

:host-context(h1) {}

:unknown {}

:unknown() {}

:unknown(foo) {}

:unknown(foo bar) {}

:unknown(foo, bar) {}

:unknown([foo]) {}

:unknown((foo bar)) {}

:unknown(((foo bar))) {}

:unknown({foo: bar}) {}

:unknown({{foo: bar}}) {}

:unknown({foo: bar !important}) {}

:unknown("string") {}

:unknown("string", foo) {}

:unknown('string') {}

:unknown(url(foo.png)) {}

:unknown({!}) {}

:unknown(!) {}

:unknown({;}) {}

:unknown(;) {}