docs: added missing whitespaces

aio/content/guide/aot-compiler.md

@@ -659,7 +659,7 @@ There is no convenient way to describe this constraint to TypeScript and the tem
 
 The non-null assertion operator should be used sparingly as refactoring of the component might break this constraint.
 
-In this example it is recommended to include the checking of `address` in the `*ngIf`as shown below:
+In this example it is recommended to include the checking of `address` in the `*ngIf` as shown below:
 
 ```typescript
   @Component({

aio/content/guide/dependency-injection-in-action.md

@@ -574,7 +574,7 @@ as the token for a provider of `LoggerService`.
 
 An abstract class is usually a base class that you can extend.
 In this app, however there is no class that inherits from `MinimalLogger`.
-The `LoggerService` and the `DateLoggerService`could have inherited from `MinimalLogger`,
+The `LoggerService` and the `DateLoggerService` could have inherited from `MinimalLogger`,
 or they could have implemented it instead, in the manner of an interface.
 But they did neither.
 `MinimalLogger` is used only as a dependency injection token.

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

@@ -564,7 +564,7 @@ The next step is to add a binding to the `ChildComponent` template.
 </code-example>
 
 To render the new values, add `<app-child>` to the bottom of
-the`AppComponent` template so the view also displays the sunflower:
+the `AppComponent` template so the view also displays the sunflower:
 
 ```
 Child Component

aio/content/guide/schematics-authoring.md

@@ -30,7 +30,7 @@ The context also defines a *merge strategy* that determines how changes are merg
 ### Defining rules and actions
 
 When you create a new blank schematic with the [Schematics CLI](#cli), the generated entry function is a *rule factory*.
-A `RuleFactory`object defines a higher-order function that creates a `Rule`.
+A `RuleFactory` object defines a higher-order function that creates a `Rule`.
 
 <code-example language="TypeScript" header="index.ts">
 import { Rule, SchematicContext, Tree } from '@angular-devkit/schematics';

aio/content/guide/testing.md

@@ -2972,7 +2972,7 @@ appropriate to the method, that is, the parameter of an `@NgModule`,
 {@a testbed-methods}
 {@a testbed-api-summary}
 
-The `TestBed` API consists of static class methods that either update or reference a _global_ instance of the`TestBed`.
+The `TestBed` API consists of static class methods that either update or reference a _global_ instance of the `TestBed`.
 
 Internally, all static methods cover methods of the current runtime `TestBed` instance,
 which is also returned by the `getTestBed()` function.

aio/content/guide/upgrade-performance.md

@@ -315,7 +315,7 @@ Angular app. The setup for a hybrid app is mostly the same as described in the
 `main-aot.ts`.
 
 AOT needs to load any AngularJS files that are in the `<script>` tags in the AngularJS `index.html`.
-An easy way to copy them is to add each to the `copy-dist-files.js`file.
+An easy way to copy them is to add each to the `copy-dist-files.js` file.
 
 You also need to pass the generated `MainAngularModuleFactory` to `downgradeModule()` instead of the
 custom bootstrap function:

aio/content/tutorial/toh-pt6.md

@@ -272,7 +272,7 @@ That header is in the `httpOptions` constant defined in the `HeroService`. Add t
 </code-example>
 
 Refresh the browser, change a hero name and save your change. The `save()`
-method in `HeroDetailComponent`navigates to the previous view.
+method in `HeroDetailComponent` navigates to the previous view.
 The hero now appears in the list with the changed name.