docs(glossary): copyedits and dropped unused Dart blocks (#3455)

* docs(glossary): copyedits and dropped unused Dart blocks
* post-review updates

cc @kapunahelewong @kwalrath

public/docs/ts/latest/glossary.jade

@@ -46,11 +46,9 @@ a#aot
 
       For details and examples, see the [Angular Modules (NgModule)](!{docsLatest}/guide/ngmodule.html) page.
 
-+ifDocsFor('ts|dart')
 :marked
   ## Annotation
 .l-sub-section
-    block annotation-defn
   :marked
     In practice, a synonym for [Decoration](#decorator).
 
@@ -120,16 +118,16 @@ a#attribute-directives
 
     Sometimes refers to a [dependency-injection](#dependency-injection) binding
     between a "token"—also referred to as a "key"—and a dependency [provider](#provider).
-    When using this more rare usage, be clear in context.
 
 :marked
   ## Bootstrap
 .l-sub-section
-  block bootstrap-defn-top
   :marked
-      You launch an Angular application by "bootstrapping" it using the application root Angular module (`AppModule`). Bootstrapping identifies an application's top level "root" [component](#component), which is the first component that is loaded for the application.
+    You launch an Angular application by "bootstrapping" it using the application root Angular module (`AppModule`).
+    Bootstrapping identifies an application's top level "root" [component](#component),
+    which is the first component that is loaded for the application.
     For more information, see the [Setup](!{docsLatest}/guide/setup.html) page.
-  :marked
+
     You can bootstrap multiple apps in the same `index.html`, each app with its own top-level root.
 
 .l-main-section#C
@@ -200,14 +198,11 @@ a#component
      * [Style binding](!{docsLatest}/guide/template-syntax.html#style-binding).
      * [Two-way data binding with ngModel](!{docsLatest}/guide/template-syntax.html#ngModel).
 
-
-+ifDocsFor('ts|dart')
 a#decorator
 a#decoration
 :marked
   ## Decorator | decoration
 .l-sub-section
-    block decorator-defn
   :marked
     A *function* that adds metadata to a class, its members (properties, methods) and function arguments.
 
@@ -296,7 +291,7 @@ a#directives
     An Angular class responsible for creating, reshaping, and interacting with HTML elements
     in the browser DOM. The directive is Angular's most fundamental feature.
 
-    A directive is ususally associated with an HTML element or attribute.
+    A directive is usually associated with an HTML element or attribute.
     This element or attribute is often referred to as the directive itself.
 
     When Angular finds a directive in an HTML template,
@@ -308,22 +303,20 @@ a#directives
     as if you were writing native HTML. In this way, directives become extensions of
     HTML itself.
 
-
     Directives fall into one of the following categories:
 
     * [Components](#component) combine application logic with an HTML template to
     render application [views](#view). Components are usually represented as HTML elements.
     They are the building blocks of an Angular application.
 
-    1. [Attribute directives](#attribute-directive) can listen to and modify the behavior of
+    * [Attribute directives](#attribute-directive) can listen to and modify the behavior of
     other HTML elements, attributes, properties, and components. They are usually represented
     as HTML attributes, hence the name.
 
-    1. [Structural directives](#structural-directive) are responsible for
+    * [Structural directives](#structural-directive) are responsible for
     shaping or reshaping HTML layout, typically by adding, removing, or manipulating
     elements and their children.
 
-
 .l-main-section#E
 
 :marked
@@ -449,7 +442,6 @@ a#jit
 :marked
   ## Module
 .l-sub-section
-  block module-defn
   .alert.is-important
     :marked
      Angular has the following types of modules:
@@ -492,7 +484,7 @@ a#N
     :marked
       An array whose items arrive asynchronously over time.
       Observables help you manage asynchronous data, such as data coming from a backend service.
-      Observables are used within Angular itself, including Angular's event system and its http client service.
+      Observables are used within Angular itself, including Angular's event system and its HTTP client service.
 
       To use observables, Angular uses a third-party library called Reactive Extensions (RxJS).
       Observables are a proposed feature for ES2016, the next version of JavaScript.
@@ -548,7 +540,6 @@ a#N
 a#Q
 .l-main-section#R
 
-+ifDocsFor('ts|js')
 :marked
   ## Reactive forms
 .l-sub-section
@@ -588,7 +579,6 @@ a#Q
 
       For more information, see the [Routing & Navigation](!{docsLatest}/guide/router.html) page.
 
-+ifDocsFor('ts|js')
 :marked
   ## Router module
 .l-sub-section
@@ -607,7 +597,6 @@ a#Q
 
 .l-main-section#S
 
-+ifDocsFor('ts|js')
 :marked
   ## Scoped package
 .l-sub-section
@@ -645,9 +634,7 @@ a#Q
 a#snake-case
 :marked
   ## snake_case
-
 .l-sub-section
-  block snake-case-defn
   :marked
     The practice of writing compound words or phrases such that an
     underscore (`_`) separates one word from the next. This form is also known as *underscore case*.
@@ -663,7 +650,7 @@ a#structural-directives
     shape or reshape HTML layout, typically by adding and removing elements in the DOM.
     The `ngIf` "conditional element" directive and the `ngFor` "repeater" directive are well-known examples.
 
-    Read more in the [_Structural Directives_](!{docsLatest}/guide/structural-directives.html) guide.
+    Read more in the [Structural Directives](!{docsLatest}/guide/structural-directives.html) page.
 
 .l-main-section#T
 :marked
@@ -674,8 +661,6 @@ a#structural-directives
     the support and guidance of an Angular [directive](#directive),
     most notably a [component](#component).
 
-
-+ifDocsFor('ts|js')
 :marked
   ## Template-driven forms
 .l-sub-section
@@ -756,7 +741,6 @@ a#Y
 :marked
   ## Zone
 .l-sub-section
-  block zone-defn
   :marked
     A mechanism for encapsulating and intercepting
     a JavaScript application's asynchronous activity.