Clarify generator delegation (fixes nzakas#377)

Author: nzakas

manuscript/08-Iterators-And-Generators.md

@@ -726,7 +726,7 @@ I> The spread operator and `for-of` ignore any value specified by a `return` sta
 
 ### Delegating Generators
 
-In some cases, combining the values from two iterators into one is useful. Generators can delegate to other generators using a special form of `yield` with a star (`*`) character. As with generator definitions, where the star appears doesn't matter, as long as the star falls between the `yield` keyword and the generator function name. Here's an example:
+In some cases, combining the values from two iterators into one is useful. Generators can delegate to other iterators using a special form of `yield` with a star (`*`) character. As with generator definitions, where the star appears doesn't matter, as long as the star falls between the `yield` keyword and the generator function name. Here's an example:
 
 ```js
 function *createNumberIterator() {
@@ -755,7 +755,7 @@ console.log(iterator.next());           // "{ value: true, done: false }"
 console.log(iterator.next());           // "{ value: undefined, done: true }"
 ```
 
-In this example, the `createCombinedIterator()` generator delegates first to `createNumberIterator()` and then to `createColorIterator()`. The returned iterator appears, from the outside, to be one consistent iterator that has produced all of the values. Each call to `next()` is delegated to the appropriate iterator until the iterators created by `createNumberIterator()` and `createColorIterator()` are empty. Then the final `yield` is executed to return `true`.
+In this example, the `createCombinedIterator()` generator delegates first to iterator returned from `createNumberIterator()` and then to the iterator returned from `createColorIterator()`. The iterator returned from `createCombinedIterator()` appears, from the outside, to be one consistent iterator that has produced all of the values. Each call to `next()` is delegated to the appropriate iterator until the iterators created by `createNumberIterator()` and `createColorIterator()` are empty. Then the final `yield` is executed to return `true`.
 
 Generator delegation also lets you make further use of generator return values. This is the easiest way to access such returned values and can be quite useful in performing complex tasks. For example: