PhpCsFixer\Fixer\PhpTag\LinebreakAfterOpeningTagFixer::fix PHP Метод

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        // ignore files with short open tag and ignore non-monolithic files
        if (!$tokens[0]->isGivenKind(T_OPEN_TAG) || !$tokens->isMonolithicPhp()) {
            return;
        }
        $newlineFound = false;
        foreach ($tokens as $token) {
            if ($token->isWhitespace() && false !== strpos($token->getContent(), "\n")) {
                $newlineFound = true;
                break;
            }
        }
        // ignore one-line files
        if (!$newlineFound) {
            return;
        }
        $token = $tokens[0];
        $token->setContent(rtrim($token->getContent()) . $this->whitespacesConfig->getLineEnding());
    }