docs(arch,hier-dep,temp-syntax,toh-5): misc copyedits (#3375)

* docs(architecture): copyedit

Follow-up fix to
https://github.com/angular/angular.io/commit/e6741efd8f4fad20ca519d8eb99
ec0c7d102577d#commitcomment-21321447

* docs(hierarchical-dependency): copyedit

* doc(template-syntax): copyedits

* docs(toh-5): remove unnecessary block, trim whitespace

public/docs/ts/latest/guide/architecture.jade

@@ -252,7 +252,7 @@ block ts-decorator
     The `@Component` decorator takes a required configuration object with the
     information Angular needs to create and present the component and its view.
 
-    Here are a few of the most useful @Component configuration options:
+    Here are a few of the most useful `@Component` configuration options:
 
 :marked
   - `selector`: CSS selector that tells Angular to create and insert an instance of this component

public/docs/ts/latest/guide/hierarchical-dependency-injection.jade

@@ -115,6 +115,7 @@ figure.image-display
   Each selected hero tax return opens in its own component and multiple returns can be open at the same time.
 
   Each tax return component has the following characteristics:
+
   * Is its own tax return editing session.
   * Can change a tax return without affecting a return in another component.
   * Has the ability to save the changes to its tax return or cancel them.

public/docs/ts/latest/guide/template-syntax.jade

@@ -21,7 +21,7 @@ style.
 
 a#toc
 :marked
-  ### Table of contents
+  ### Contents
 
   This guide covers the basic elements of the Angular template syntax, elements you'll need to construct the view:
 
@@ -528,7 +528,6 @@ table(width="100%")
       <code>style</code> property
     td
       +makeExample('template-syntax/ts/src/app/app.component.html', 'style-binding-syntax-1')(format=".")
-</div>
 
 :marked
   With this broad view in mind, you're ready to look at binding types in detail.
@@ -699,7 +698,7 @@ a#one-time-initialization
 
 :marked
   Fortunately, Angular data binding is on alert for dangerous HTML.
-  It *sanitizes* the values before displaying them.
+  It [*sanitizes*](security#sanitization-and-security-contexts) the values before displaying them.
   It **will not** allow HTML with script tags to leak into the browser, neither with interpolation
   nor property binding.
 

public/docs/ts/latest/tutorial/toh-pt5.jade

@@ -608,7 +608,7 @@ block extract-id
   When a user selects a hero in the dashboard, the app should navigate to the `HeroDetailComponent` to view and edit the selected hero.
 
   Although the dashboard heroes are presented as button-like blocks, they should behave like anchor tags.
-  When hovering over a hero block, the target URL should display in the browser status bar 
+  When hovering over a hero block, the target URL should display in the browser status bar
   and the user should be able to copy the link or open the hero detail view in a new tab.
 
   To achieve this effect, reopen the <span ngio-ex>dashboard.component.html</span> and replace the repeated `<div *ngFor...>` tags
@@ -643,19 +643,19 @@ block extract-id
   :marked
     ## Refactor routes to a _Routing Module_
 
-    Almost 20 lines of `AppModule` are devoted to configuring four routes. 
-    Most applications have many more routes and they [add guard services](../guide/router.html#guards) 
-    to protect against unwanted or unauthorized navigations. 
-    Routing considerations could quickly dominate this module and obscure its primary purpose which is to 
+    Almost 20 lines of `AppModule` are devoted to configuring four routes.
+    Most applications have many more routes and they [add guard services](../guide/router.html#guards)
+    to protect against unwanted or unauthorized navigations.
+    Routing considerations could quickly dominate this module and obscure its primary purpose which is to
     establish key facts about the entire app for the Angular compiler.
 
     We should refactor the routing configuration into its own class.
-    What kind of class? 
+    What kind of class?
     The current `RouterModule.forRoot()` produces an Angular `ModuleWithProviders` which suggests that a
     class dedicated to routing should be some kind of module.
     It should be a [_Routing Module_](../guide/router.html#routing-module).
 
-    By convention the name of a _Routing Module_ contains the word "Routing" and 
+    By convention the name of a _Routing Module_ contains the word "Routing" and
     aligns with the name of the module that declares the components navigated to.
 
     Create an `app-routing.module.ts` file as a sibling to `app.module.ts`. Give it the following contents extracted from the `AppModule` class:
@@ -667,7 +667,7 @@ block extract-id
 
     * Adds `RouterModule.forRoot(routes)` to `imports`.
 
-    * Adds `RouterModule` to `exports` so that the components in the companion module have access to Router declarables 
+    * Adds `RouterModule` to `exports` so that the components in the companion module have access to Router declarables
     such as `RouterLink` and `RouterOutlet`.
 
     * No `declarations`!  Declarations are the responsibility of the companion module.
@@ -676,7 +676,7 @@ block extract-id
 
     ### Update _AppModule_
 
-    Now delete the routing configuration from `AppModule` and import the `AppRoutingModule` 
+    Now delete the routing configuration from `AppModule` and import the `AppRoutingModule`
     (_both_ with an ES `import` statement _and_ by adding it to the `NgModule.imports` list).
 
     Here is the revised `AppModule`, compared to its pre-refactor state:
@@ -770,7 +770,7 @@ block heroes-component-cleanup
 :marked
   ### Update the _HeroesComponent_ class.
 
-  The `HeroesComponent` navigates to the `HeroDetailComponent` in response to a button click. 
+  The `HeroesComponent` navigates to the `HeroDetailComponent` in response to a button click.
   The button's _click_ event is bound to a `gotoDetail` method that navigates _imperatively_
   by telling the router where to go.
 
@@ -863,9 +863,8 @@ block css-files
 
     +makeExcerpt('src/app/app.component.ts (active router links)', 'template')
 
-block style-urls
-  :marked
-    Add a `styleUrls` property that points to this CSS file as follows.
+:marked
+  Add a `styleUrls` property that refers to this CSS file as follows:
 
 +makeExcerpt('src/app/app.component.ts','styleUrls')
 
@@ -935,7 +934,7 @@ block file-tree-end
         .file index.html
         .file styles.css
         .file systemjs.config.js
-        .file tsconfig.json          
+        .file tsconfig.json
       .file node_modules ...
       .file package.json