code: private function printBlockString($value, $isDescription)
      {
          $escaped = str_replace('"""', '\\"""', $value);
  
          return ($value[0] === ' ' || $value[0] === "\t") && strpos($value, "\n") === false
              ? ('"""' . preg_replace('/"$/', "\"\n", $escaped) . '"""')
              : ('"""' . "\n" . ($isDescription ? $escaped : $this->indent($escaped)) . "\n" . '"""');
      }
docs: Print a block string in the indented block form by adding a leading and
  trailing blank line. However, if a block string starts with whitespace and is
  a single-line, adding a leading blank line would strip that whitespace.