code: protected function applyFix(\SplFileInfo $file, Tokens $tokens)
      {
          $ending = $this->whitespacesConfig->getLineEnding();
  
          foreach ($tokens as $tokenIndex => $token) {
              if (!$token->isGivenKind([T_CONSTANT_ENCAPSED_STRING, T_ENCAPSED_AND_WHITESPACE])) {
                  continue;
              }
  
              $tokens[$tokenIndex] = new Token([
                  $token->getId(),
                  Preg::replace(
                      '#\R#u',
                      $ending,
                      $token->getContent()
                  ),
              ]);
          }
      }
docs: {@inheritdoc}