Looks like the problem is in Core/generator.php: here, here and here. If I understand correctly, replacing in each case

$strlen = max( $strlen, strlen( $parameter ) );

by

$strlen = max( $strlen, mb_strlen( $parameter ) );

and

" |" . str_pad( $parameter, $strlen, " " ) . " = $value\n";

by something like

" |$parameter" . str_repeat( " ", $strlen - mb_strlen( $parameter ) ) . " = $value\n";

should solve the issue.
(It might be also a good idea to refactor such code into a separate function instead of copy-pasting it...)

Well, I've created a pull request at GitHub. Hopefully, this will speed up the process..