Update CHANGES.md

Author: benjchristensen

CHANGES.md

@@ -4,17 +4,17 @@
 
 Version 0.20.0-RC2 preview release adds support for backpressure to the `zip` operators, fixes bugs and removes the `Subscribe.onSetProducer` method.
 
-This means signature changes are now:
+This means signature changes are modified to be:
 
-A new type `Producer` has been added:
+The new type `Producer` ->
 
 ```java
 public interface Producer {
     public void request(long n);
 }
 ```
 
-The `Subscriber` type now has these methods added:
+New methods added to `Subscriber` ->
 
 ```java
 public abstract class Subscriber<T> implements Observer<T>, Subscription {