Query execution bug with groups

[KonradStanski]

When executing the query
test lang:python on the demo, this produces 15 results:
https://sourcebot.dev/search?query=test%20lang%3Apython
When this is changed to
test (lang:python) this drops to 0.
https://sourcebot.dev/search?query=test%20(lang%3Apython)

this should be equivalent, so something is getting mangled.

[KonradStanski]

May be because the () are not being escaped correctly in the URL?
%28 could be used instead?
I have not looked at how the querying is passed down yet, but this should be fixed too.

[brendan-kellam]

I need to dig more into how the zoekt parser works, but for reference test lang:python and (test lang:python) are equivalent. (1, 2)

Another data point is that lang:python works, but (lang:python) does not (1, 2).

Ultimately, these feel like edge-case within zoekt's parser. One UX thing we can do is add error underlying (aka "red squiggles") that highlight syntax errors in the user's query.

[KonradStanski]

I tried this with sourcegraph, and it seems to work there. Is there any chance that the sourcebot backend is doing anything?
Alternatively I can open a PR in the zoekt repo adding this as a test case (and fix it there in the parser if it's actually broken)