Handle cht.sh 404 better

[tennox]

Took me a while to figure this out (and still don't know why cht.sh is doing this) but for some queries the second snippet returns 404 (but the next ones work again) 🤔

But this issue is about handling it better, as this extension shows this:

Maybe a 404 could be shown as such?

[tennox]

Oh damn I just saw it returns HTTP 200:

$ http https://cht.sh/rust/flush+stdout/1
HTTP/1.1 200 OK
Connection: keep-alive
Content-Length: 1611
Content-Type: text/plain; charset=utf-8
Date: Fri, 03 Mar 2023 15:57:31 GMT
Server: nginx/1.13.12
Strict-Transport-Security: max-age=63072000; includeSubdomains
X-Content-Type-Options: nosniff
X-Frame-Options: DENY

/*
 * 404 NOT FOUND
 * 
 * Unknown cheat sheet. Please try to reformulate your query.
 * Query format:
 */

 /LANG/QUESTION

// Examples:

[tennox]

I opened a bug report on cheat.sh as that's kinda weird anyways:

chubin/cheat.sh#377

[VladBrok]

Yeah, I think that this response from cht.sh looks fine:

/*
 * 404 NOT FOUND
 * 
 * Unknown cheat sheet. Please try to reformulate your query.
 * Query format:
 */

 /LANG/QUESTION

 // Examples:
 /python/read+json

But if the configuration option "verbose" is false, then the response looks weird. I think we can fix that