SlevomatCodingStandard.Namespaces.ReferenceUsedNamesOnly: disabled because it enforces `use` statements in the global code

Preserves this format:

private static function isEqual(
mixed $expected,
mixed $actual,
): bool
{

Preserves this format:

&& (getenv('FORCE_COLOR')
|| (function_exists('sapi_windows_vt100_support')
? sapi_windows_vt100_support(STDOUT)
: @stream_isatty(STDOUT)) // @ may trigger error 'cannot cast a filtered stream on this system'
);

Preserves this format:

echo "<h1 style='all:initial; display:block; font-size:2em; margin:1em 0'>",
htmlspecialchars($string),
"</h1>\n";