Domain to prefix leaves _w or _wiki in filenames.

[robkam]

On Windows, (Git Bash and WSL). Converting domains to prefix leaves trailing _w

e.g. for https://desencyclopedie.org the archive at https://archive.org/details/wiki-desencyclopedie.org_w-20231104 the filename prefix should be desencyclopedieorg but has a trailing _w

[yzqzss]

not a bug, it is what it is.

[robkam]

there is no label for cruft

[robkam]

Fixed in #216