add manual_let_else lint

Signed-off-by: strawberry <strawberry@puppygock.gay>

Cargo.toml

@@ -525,6 +525,7 @@ single_match = "warn"
 single_match_else = "warn"
 explicit_deref_methods = "warn"
 explicit_iter_loop = "warn"
+manual_let_else = "warn"
 
 # some sadness
 missing_errors_doc = "allow"

src/service/sending/appservice.rs

@@ -14,11 +14,8 @@ pub(crate) async fn send_request<T>(registration: Registration, request: T) -> R
 where
 	T: OutgoingRequest + Debug,
 {
-	let destination = match registration.url {
-		Some(url) => url,
-		None => {
+	let Some(destination) = registration.url else {
 		return Ok(None);
-		},
 	};
 
 	let hs_token = registration.hs_token.as_str();