docs: fix 3 typos and a format issue (angular#56329)

PR Close angular#56329

Author: PrestonMonteWest

adev/src/content/guide/testing/code-coverage.md

@@ -50,7 +50,7 @@ coverageReporter: {
 }
 </docs-code>
 
-HELPFUL: Read more about creating and fine tunning Karma configuration in the [testing guide](guide/testing#configuration).
+HELPFUL: Read more about creating and fine tuning Karma configuration in the [testing guide](guide/testing#configuration).
 
 The `check` property causes the tool to enforce a minimum of 80% code coverage when the unit tests are run in the project.
 

adev/src/content/reference/configs/file-structure.md

@@ -25,7 +25,7 @@ Angular also supports workspaces with [multiple projects](#multiple-projects).
 This type of development environment is suitable for advanced users who are developing shareable libraries,
 and for enterprises that use a "monorepo" development style, with a single repository and global configuration for all Angular projects.
 
-To set up a monorepo workspace, you should skip the creating the root application.
+To set up a monorepo workspace, you should skip creating the root application.
 See [Setting up for a multi-project workspace](#multiple-projects) below.
 
 ## Workspace configuration files

adev/src/content/tools/libraries/creating-libraries.md

@@ -38,7 +38,7 @@ See [Setting up for a multi-project workspace](reference/configs/file-structure#
 
 When you generate a new library, the workspace configuration file, `angular.json`, is updated with a project of type `library`.
 
-<docs-code>
+<docs-code language="json">
 
 "projects": {
  …

adev/src/content/tools/libraries/using-libraries.md

@@ -1,6 +1,6 @@
 # Usage of Angular libraries published to npm
 
-When you build your Angular application, take advantage of sophisticated first-party libraries, as well as rich ecosystem of third-party libraries.
+When you build your Angular application, take advantage of sophisticated first-party libraries, as well as a rich ecosystem of third-party libraries.
 [Angular Material][AngularMaterialMain] is an example of a sophisticated first-party library.
 
 ## Install libraries