Fix typo in connection_manager/mod.rs
@@ -323,7 +323,7 @@ impl Connector {
///
/// # Errors
///
- /// Returns a ConnectionManagerError is the connection manager
+ /// Returns a ConnectionManagerError if the connection manager
/// has stopped running.
pub fn unsubscribe(&self, subscriber_id: SubscriberId) -> Result<(), ConnectionManagerError> {
let (sender, recv) = channel();
