code: private static function trimDesc($desc)
      {
          $lines = \explode("\n", $desc);
          $leadingSpaces = array();
          foreach ($lines as $line) {
              if (\strlen($line)) {
                  $leadingSpaces[] = \strspn($line, ' ');
              }
          }
          \array_shift($leadingSpaces);    // first line will always have zero leading spaces
          $trimLen = $leadingSpaces
              ? \min($leadingSpaces)
              : 0;
          if (!$trimLen) {
              return $desc;
          }
          foreach ($lines as $i => $line) {
              $lines[$i] = $i > 0 && \strlen($line)
                  ? \substr($line, $trimLen)
                  : $line;
          }
          $desc = \implode("\n", $lines);
          return $desc;
      }
docs: Trim leading spaces from each description line
  
  @param string $desc string to trim
  
  @return string