docs: remove redundant whitespaces and fix minor typos (#33422)

PR Close #33422

aio/content/guide/comparing-observables.md

@@ -27,7 +27,7 @@ new Observable((observer) => { subscriber_fn });
 // initiate execution
 observable.subscribe(() => {
   // observer handles notifications
-    });
+});
 </code-example>
 
 * Promises execute immediately, and just once. The computation of the result is initiated when the promise is created. There is no way to restart work. All `then` clauses (subscriptions) share the same computation.
@@ -38,7 +38,7 @@ new Promise((resolve, reject) => { executer_fn });
 // handle return value
 promise.then((value) => {
   // handle result here
-    });
+});
 </code-example>
 
 ### Chaining
@@ -314,6 +314,3 @@ An observable produces values over time. An array is created as a static set of
     </td>
   </tr>
 </table>
-
-
-

aio/content/guide/component-interaction.md

@@ -129,7 +129,7 @@ Detect and act upon changes to input property values with the `ngOnChanges()` me
 
 You may prefer this approach to the property setter when watching multiple, interacting input properties.
 
-Learn about `ngOnChanges()` in the [LifeCycle Hooks](guide/lifecycle-hooks) chapter.
+Learn about `ngOnChanges()` in the [Lifecycle Hooks](guide/lifecycle-hooks) chapter.
 
 </div>
 

aio/content/guide/dependency-injection-navtree.md

@@ -283,4 +283,3 @@ Here's a revised version that defaults to `parent` but also accepts an optional
 And here's how you could use it with a different parent type.
 
 <code-example path="dependency-injection-in-action/src/app/parent-finder.component.ts" region="beth-providers" header="dependency-injection-in-action/src/app/parent-finder.component.ts"></code-example>
-

aio/content/guide/dependency-injection.md

@@ -314,5 +314,3 @@ Dive deeper into the capabilities and advanced feature of the Angular DI system
 * Learn more about [DI tokens and providers](guide/dependency-injection-providers).
 
 * [Dependency Injection in Action](guide/dependency-injection-in-action) is a cookbook for some of the interesting things you can do with DI.
-
-

aio/content/guide/forms-overview.md

@@ -283,4 +283,3 @@ To learn more about template-driven forms, see the following guides:
 
 * [Template-driven Forms](guide/forms#template-driven-forms)
 * [Form Validation](guide/form-validation#template-driven-validation)
-

aio/content/guide/http.md

@@ -988,7 +988,7 @@ use `HttpClientXsrfModule.withOptions()` to override the defaults.
 ## Testing HTTP requests
 
 As for any external dependency, you must mock the HTTP backend so your tests can simulate interaction with a remote server.
-The `@angular/common/http/testing` library makes it straightforward to set up such mocking .
+The `@angular/common/http/testing` library makes it straightforward to set up such mocking.
 
 Angular's HTTP testing library is designed for a pattern of testing in which the app executes code and makes requests first.
 The test then expects that certain requests have or have not been made,

aio/content/guide/migration-injectable.md

@@ -83,4 +83,3 @@ However, as noted above, classes that already have another class decorator like
 ## Should I update my library?
 
 Yes, if your library has any tokens that are meant to be injected, they should be updated with the `@Injectable()` decorator. In a future version of Angular, a missing `@Injectable()` decorator will always throw an error.
-

aio/content/guide/service-worker-getting-started.md

@@ -76,7 +76,7 @@ To simulate a network issue, disable network interaction for your application. I
 
 <figure class="lightbox">
   <div class="card">
-    <img src="generated/images/guide/service-worker/offline-checkbox.png" alt="The offline checkbox in the Network tab pis checked">
+    <img src="generated/images/guide/service-worker/offline-checkbox.png" alt="The offline checkbox in the Network tab is checked">
   </div>
 </figure>
 

aio/content/guide/set-document-title.md

@@ -74,4 +74,3 @@ If you bootstrap your application into a different platform,
 you'll have to provide a different `Title` service that understands
 the concept of a "document title" for that specific platform.
 Ideally, the application itself neither knows nor cares about the runtime environment.
-

aio/content/guide/template-syntax.md

@@ -938,7 +938,7 @@ followed by a dot (`.`) and the name of a CSS style property: `[style.style-prop
 <code-example path="attribute-binding/src/app/app.component.html" region="style-binding" header="src/app/app.component.html"></code-example>
 
 Some style binding styles have a unit extension.
-The following example conditionally sets the font size in  “em” and “%” units .
+The following example conditionally sets the font size in  “em” and “%” units.
 
 <code-example path="attribute-binding/src/app/app.component.html" region="style-binding-condition" header="src/app/app.component.html"></code-example>
 

aio/content/guide/upgrade.md

@@ -968,7 +968,7 @@ Once you introduce the Angular Router, using the Angular Router triggers navigat
 
 You can take advantage of Ahead-of-time (AOT) compilation on hybrid apps just like on any other
 Angular application.
-The setup for an hybrid app is mostly the same as described in
+The setup for a hybrid app is mostly the same as described in
 [the Ahead-of-time Compilation chapter](guide/aot-compiler)
 save for differences in `index.html` and `main-aot.ts`
 

aio/content/start/forms.md

@@ -85,4 +85,3 @@ After putting a few items in the cart, users can now review their items, enter n
 Congratulations! You have a complete online store application with a product catalog, a shopping cart, and a checkout function.
 
 [Continue to the "Deployment" section](start/deployment "Getting Started: Deployment") to move to local development, or deploy your app to Firebase or your own server.
-

aio/content/start/index.md

@@ -15,7 +15,7 @@ This guide uses the StackBlitz Generator to show you a ready-made, simple applic
 <header>New to web development?</header>
 
 
- There are many resources to complement the Angular docs. Mozilla's MDN docs include both [HTML](https://developer.mozilla.org/en-US/docs/Learn/HTML "Learning HTML: Guides and tutorials") and [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript "JavaScript") introductions. [TypeScript's docs](https://www.typescriptlang.org/docs/home.html "TypeScript documentation") include a 5-minute tutorial. Various online course platforms, such as [Udemy](http://www.udemy.com "Udemy online courses") and [Codecademy](https://www.codecademy.com/ "Codeacademy online courses"), also cover web development basics.
+ There are many resources to complement the Angular docs. Mozilla's MDN docs include both [HTML](https://developer.mozilla.org/en-US/docs/Learn/HTML "Learning HTML: Guides and tutorials") and [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript "JavaScript") introductions. [TypeScript's docs](https://www.typescriptlang.org/docs/home.html "TypeScript documentation") include a 5-minute tutorial. Various online course platforms, such as [Udemy](http://www.udemy.com "Udemy online courses") and [Codecademy](https://www.codecademy.com/ "Codecademy online courses"), also cover web development basics.
 
 
 </div>
@@ -366,4 +366,3 @@ You've also learned how the component class and template interact, and how compo
 To continue exploring Angular, choose either of the following options:
 * [Continue to the "Routing" section](start/routing "Getting Started: Routing") to create a product details page that can be accessed by clicking a product name and that has its own URL pattern.
 * [Skip ahead to the "Deployment" section](start/deployment "Getting Started: Deployment") to move to local development, or deploy your app to Firebase or your own server.
-