Description:
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NumberFormatter's formatCurrency() function no longer respects an empty currency symbol.

Output of test script in PHP 7.4.13 (Windows):

	string(6) "0.0043"

Output of test script in PHP 8.0.1 (Windows):

	string(11) "BTC 0.0043"

Conclusion: Something has changed.

I cannot find any mention whatsoever of PHP 8 here: https://www.php.net/manual/en/numberformatter.formatcurrency.php

I asked it here but nobody can even reproduce it (possibly because they don't use Windows?): https://stackoverflow.com/questions/65636460/how-to-resolve-this-new-bug-change-in-behaviour-in-php-8-x-in-regards-to-numberf

Test script:
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$a = new \NumberFormatter('en_US', \NumberFormatter::CURRENCY);
$a->setAttribute(\NumberFormatter::MAX_FRACTION_DIGITS, 8);
$a->setSymbol(NumberFormatter::CURRENCY_SYMBOL, ''); // It's empty because I want it "minimal" for a table cell.
var_dump($a->formatCurrency(0.0043, 'BTC'));