PhpCsFixer\Fixer\Whitespace\NoWhitespaceInBlankLineFixer::fix PHP Метод

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        foreach ($tokens as $index => $token) {
            if (!$token->isWhitespace()) {
                continue;
            }
            $content = $token->getContent();
            $lines = preg_split("/(\r\n|\n)/", $content);
            if (count($lines) > 2 || count($lines) > 1 && !isset($tokens[$index + 1])) {
                $lMax = count($lines) - 1;
                if (!isset($tokens[$index + 1])) {
                    ++$lMax;
                }
                $lStart = 1;
                if (isset($tokens[$index - 1]) && $tokens[$index - 1]->isGivenKind(T_OPEN_TAG) && "\n" === substr($tokens[$index - 1]->getContent(), -1)) {
                    $lStart = 0;
                }
                for ($l = $lStart; $l < $lMax; ++$l) {
                    $lines[$l] = preg_replace('/^\\h+$/', '', $lines[$l]);
                }
                $token->setContent(implode($this->whitespacesConfig->getLineEnding(), $lines));
            }
        }
    }