code: private function fixEmptyElse(Tokens $tokens, $index)
      {
          $next = $tokens->getNextMeaningfulToken($index);
          if ($tokens[$next]->equals('{')) {
              $close = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_CURLY_BRACE, $next);
              if (1 === $close - $next) { // '{}'
                  $this->clearElse($tokens, $index);
              } elseif ($tokens->getNextMeaningfulToken($next) === $close) { // '{/**/}'
                  $this->clearElse($tokens, $index);
              }
  
              return;
          }
  
          // short `else`
          $end = $tokens->getNextTokenOfKind($index, [';', [T_CLOSE_TAG]]);
          if ($next === $end) {
              $this->clearElse($tokens, $index);
          }
      }
docs: Remove tokens part of an `else` statement if not empty (i.e. no meaningful tokens inside).
  
  @param Tokens $tokens
  @param int    $index  T_ELSE index