chore(toh-6): refresh cache file (#2207)

No other changes.

Author: chalin

public/docs/ts/_cache/tutorial/toh-pt6.jade

@@ -12,7 +12,7 @@ block includes
 - var _promise = _Promise.toLowerCase()
 
 :marked
-  # Getting and Saving Data using HTTP
+  # Getting and Saving Data
 
   Our stakeholders appreciate our progress.
   Now they want to get the hero data from a server, let users add, edit, and delete heroes,
@@ -46,22 +46,22 @@ block start-server-and-watch
 h1 Providing HTTP Services
 block http-library
   :marked
-    `Http` is ***not*** a core Angular module.
+    The `HttpModule` is ***not*** a core Angular module.
     It's Angular's optional approach to web access and it exists as a separate add-on module called `@angular/http`,
     shipped in a separate script file as part of the Angular npm package.
 
     Fortunately we're ready to import from `@angular/http` because `systemjs.config` configured *SystemJS* to load that library when we need it.
 
 :marked
-  ### Register (provide) HTTP services
+  ### Register for HTTP services
 
 block http-providers
   :marked
     Our app will depend upon the Angular `http` service which itself depends upon other supporting services.
-    The `HttpModule` from `@angular/http` library holds providers for the complete set of `http` services.
+    The `HttpModule` from `@angular/http` library holds providers for a complete set of HTTP services.
 
-    We should be able to access `http` services from anywhere in the application.
-    So we register them in the `imports` array of `app.module.ts` where we
+    We should be able to access these services from anywhere in the application.
+    So we register them all by adding `HttpModule` to the `imports` list of the `AppModule` where we
     bootstrap the application and its root `AppComponent`.
 
   +makeExample('app/app.module.ts', 'v1','app/app.module.ts (v1)')
@@ -174,7 +174,7 @@ block get-heroes-details
   :marked
     ### Extracting the data in the *then* callback
 
-    In the *promise*'s `then` callback we call the `json` method of the http `Response` to extract the
+    In the *promise*'s `then` callback we call the `json` method of the HTTP `Response` to extract the
     data within the response.
   +makeExcerpt('app/hero.service.ts', 'to-data', '')
 
@@ -219,17 +219,18 @@ block get-heroes-details
   Although we made significant *internal* changes to `getHeroes()`, the public signature did not change.
   We still return a !{_Promise}. We won't have to update any of the components that call `getHeroes()`.
 
-  Our stakeholders are incredibly pleased with the added flexibility from the API integration, but it doesn't stop there. Next, we want the ability to create new heroes and delete heroes.
+  Our stakeholders are thrilled with the added flexibility from the API integration. 
+  Now they want the ability to create and delete heroes.
 
-  But first, let's see what happens now when we try to update a hero's details.
+  Let's see first what happens when we try to update a hero's details.
 
 .l-main-section
 :marked
   ## Update hero details
 
-  The hero detail view already allows us to edit a hero's name. Go ahead, try
-  it now. As we type, the hero name is updated in the view heading, but
-  notice what happens when we hit the `Back` button: the changes are lost!
+  We can edit a hero's name already in the hero detail view. Go ahead and try
+  it. As we type, the hero name is updated in the view heading. 
+  But when we hit the `Back` button, the changes are lost!
 
 .l-sub-section
   :marked
@@ -348,7 +349,7 @@ block get-heroes-details
 
 block observables-section-intro
   :marked
-    Each `Http` method  returns an `Observable` of HTTP `Response` objects.
+    Each `Http` service method  returns an `Observable` of HTTP `Response` objects.
 
     Our `HeroService` converts that `Observable` into a `Promise` and returns the promise to the caller.
     In this section we learn to return the `Observable` directly and discuss when and why that might be
@@ -364,7 +365,7 @@ block observables-section-intro
     Recall that our `HeroService` quickly chained the `toPromise` operator to the `Observable` result of `http.get`.
     That operator converted the `Observable` into a `Promise` and we passed that promise back to the caller.
 
-    Converting to a promise is often a good choice. We typically ask `http` to fetch a single chunk of data.
+    Converting to a promise is often a good choice. We typically ask `http.get` to fetch a single chunk of data.
     When we receive the data, we're done.
     A single result in the form of a promise is easy for the calling component to consume
     and it helps that promises are widely understood by JavaScript programmers.
@@ -456,21 +457,21 @@ block observable-transformers
 
   .l-sub-section
     :marked
-      The [switchMap operator](https://github.com/Reactive-Extensions/RxJS/blob/master/doc/api/core/operators/flatmaplatest.md)
+      The [switchMap operator](http://www.learnrxjs.io/operators/transformation/switchmap.html)
       (formerly known as "flatMapLatest") is very clever.
 
-      Every qualifying key event can trigger an http call.
-      Even with a 300ms pause between requests, we could have multiple http requests in flight
+      Every qualifying key event can trigger an `http` method call.
+      Even with a 300ms pause between requests, we could have multiple HTTP requests in flight
       and they may not return in the order sent.
 
       `switchMap` preserves the original request order while returning
-       only the observable from the most recent http call.
+       only the observable from the most recent `http` method call.
       Results from prior calls are canceled and discarded.
 
-      We also short-circuit the http call and return an observable containing an empty array
+      We also short-circuit the `http` method call and return an observable containing an empty array
       if the search text is empty.
 
-      Note that _canceling_ the `HeroSearchService` observable won't actually abort a pending http request
+      Note that _canceling_ the `HeroSearchService` observable won't actually abort a pending HTTP request
       until the service supports that feature, a topic for another day.
       We are content for now to discard unwanted results.
   :marked
@@ -495,9 +496,9 @@ block observable-transformers
   +makeExample('app/rxjs-extensions.ts')(format='.')
 
   :marked
-    We load them all at once by importing `rxjs-extensions` in `AppComponent`.
+    We load them all at once by importing `rxjs-extensions` at the top of `AppModule`.
 
-  +makeExcerpt('app/app.component.ts', 'rxjs-extensions')(format='.')
+  +makeExcerpt('app/app.module.ts', 'rxjs-extensions')(format='.')
 
 :marked
   ### Add the search component to the dashboard
@@ -509,7 +510,7 @@ block observable-transformers
 - var _declarations = _docsFor == 'dart' ? 'directives' : 'declarations'
 - var declFile = _docsFor == 'dart' ? 'app/dashboard.component.ts' : 'app/app.module.ts'
 :marked
-  And finally, we import `HeroSearchComponent` from 
+  Finally, we import `HeroSearchComponent` from 
   <span ngio-ex>hero-search.component.ts</span>
   and add it to the `!{_declarations}` !{_array}: