docs: fix typos (#109)

Author: nomyfan

src/server.rs

@@ -227,7 +227,7 @@ impl Listener {
             // to the semaphore.
             //
             // `acquire_owned()` returns `Err` when the semaphore has been
-            // closed. We don't ever close the sempahore, so `unwrap()` is safe.
+            // closed. We don't ever close the semaphore, so `unwrap()` is safe.
             let permit = self
                 .limit_connections
                 .clone()

tests/client.rs

@@ -67,7 +67,7 @@ async fn receive_message_multiple_subscribed_channels() {
 }
 
 /// test that a client accurately removes its own subscribed chanel list
-/// when unbscribing to all subscribed channels by submitting an empty vec
+/// when unsubscribing to all subscribed channels by submitting an empty vec
 #[tokio::test]
 async fn unsubscribes_from_channels() {
     let (addr, _) = start_server().await;