chore: update readme

README.md

@@ -10,12 +10,14 @@
 ## Introduction
 
 Sometimes you want to test your code with mocks and here is a mock for messaging queue. It tries to mimic the NATS concepts
-and for sure it cannot. It doesn't have any dependencies except Go standard libraries and you can easily use it in your tests.
+and for sure it cannot. It doesn't have any dependencies except Go standard libraries, and you can easily use it in your tests.
 
 ```go
 mmq := cmq.NewMockMessageQueue[int]()
 
 // register two different subscribing groups.
+// create a subscribe groip on "numbers" topic which is named "s1"
 mmq.Register("s1", "numbers", 10)
+// create a subscribe groip on "numbers" topic which is named "s2"
 mmq.Register("s2", "numbers", 10)
 ```