document connect data item

Author: nuclearace

Source/SocketIOClientSpec.swift

@@ -48,7 +48,15 @@ extension SocketIOClientSpec {
 
 /// The set of events that are generated by the client.
 public enum SocketClientEvent : String {
-    /// Emitted when the client connects. This is also called on a successful reconnection.
+    /// Emitted when the client connects. This is also called on a successful reconnection. A connect event gets one
+    /// data item: the namespace that was connected to.
+    ///
+    /// ```swift
+    /// socket.on(clientEvent: .connect) {data, ack in
+    ///     guard let nsp = data[0] as? String else { return }
+    ///     // Some logic using the nsp
+    /// }
+    /// ```
     case connect
 
     /// Called when the socket has disconnected and will not attempt to try to reconnect.