Escaping of urls in search

Noticed that
[https://dweb.me/arc/archive.org/advancedsearch?output=json&q=mediatype%3A(Texts)%20AND%20contributor%3A(Lewis%20%26%20Clark%20Community%20College%20and%20the%20National%20Great%20Rivers%20Research%20and%20Education%20Center)&rows=30&page=1&sort[]=-downloads&and[]=undefined&save=yes]
doesn't work, but
[https://archive.org/advancedsearch.php?output=json&q=mediatype%3A(Texts)%20AND%20contributor%3A(Lewis%20%26%20Clark%20Community%20College%20and%20the%20National%20Great%20Rivers%20Research%20and%20Education%20Center)&rows=30&page=1&sort[]=-downloads&and[]=undefined&save=yes]
works fine.

Looks like the wrong combination of urldecoding and urlencoding is happening in the Python Gateway,

Note this is coming from the query encoded in [https://dweb.archive.org/metadata/lewis_and_clark]

Start in the Python Gateway code that builds search URLs from the query in https://dweb.archive.org/metadata/lewis_and_clark. Compare the generated dweb.me URL with the working archive.org URL, then verify that encoding and decoding are preserved so the search request works as expected.

Written by the indexing model from the issue text.