promise chain flow

Author: joaquinelio

Diff for: 1-js/11-async/03-promise-chaining/article.md

@@ -36,15 +36,15 @@ The idea is that the result is passed through the chain of `.then` handlers.
 
 Here the flow is:
 1. The initial promise resolves in 1 second `(*)`,
-2. Then the `.then` handler is called `(**)`.
+2. Then the `.then` handler is called `(**)` wich in turn creates a new promise.
 3. The value that it returns is passed to the next `.then` handler `(***)`
 4. ...and so on.
 
 As the result is passed along the chain of handlers, we can see a sequence of `alert` calls: `1` -> `2` -> `4`.
 
 ![](promise-then-chain.svg)
 
-The whole thing works, because a call to `promise.then` returns a promise, so that we can call the next `.then` on it.
+The whole thing works, because every call to a `.then` returns a new promise, so that we can call the next `.then` on it.
 
 When a handler returns a value, it becomes the result of that promise, so the next `.then` is called with it.