Use function/const not tokenized as T_STRING when preceded by comment

[jrfnl]

The function and const keywords used in use statements are normally tokenized as T_STRING.

However, when there is a comment between the use keyword and the function/const keyword, this fails and they are tokenized as T_FUNCTION/T_CONST.

Example code where the tokenizer correction fails:

use /* comment */ function bar\math\{
    Msin,
    level\Mcos as BarCos,
    Mcosh,
};

use // phpcs:ignore Standard.Category
    const
	    bar\math\{ BGAMMA as BAR_GAMMA, BGOLDEN_RATIO };

Relevant code in the Tokenizer:

PHP_CodeSniffer/src/Tokenizers/PHP.php

Lines 1418 to 1427 in e4da24f

	// This is a special case for PHP 5.6 use function and use const
	// where "function" and "const" should be T_STRING instead of T_FUNCTION
	// and T_CONST.
	if (($newToken['code'] === T_FUNCTION
	|| $newToken['code'] === T_CONST)
	&& ($finalTokens[$lastNotEmptyToken]['code'] === T_USE || $insideUseGroup === true)
	) {
	$newToken['code'] = T_STRING;
	$newToken['type'] = 'T_STRING';
	}

As that code appears to look at the $lastNonEmptyToken, I'm not sure how to fix this....

[gsherwood]

$lastNonEmptyToken was only used to store the last non-whitespace token. Changing this store the last non-empty token as per the token util class gets this working and doesn't look to break anything.