code: protected function applyFix(\SplFileInfo $file, Tokens $tokens)
      {
          foreach ($tokens as $index => $token) {
              if (!$token->isGivenKind([T_VARIABLE, T_STRING])) {
                  continue;
              }
  
              $replaced = Preg::replaceCallback('/[^[:ascii:]]/u', static function ($matches) {
                  return isset(self::$replacements[$matches[0]])
                      ? self::$replacements[$matches[0]]
                      : $matches[0]
                  ;
              }, $token->getContent(), -1, $count);
  
              if ($count) {
                  $tokens->offsetSet($index, new Token([$token->getId(), $replaced]));
              }
          }
      }
docs: {@inheritdoc}