Fix Markdownlint errors (#11620)

CONTRIBUTING.md

@@ -30,7 +30,7 @@ Articles are written in [DocFx-flavored Markdown](https://dotnet.github.io/docfx
 
 For each Markdown file, a folder for images and a folder for sample code may exist. If the article is [fundamentals/configuration/index.md](https://github.com/aspnet/Docs/blob/master/aspnetcore/fundamentals/configuration/index.md), the images are in [fundamentals/configuration/index/\_static](https://github.com/aspnet/Docs/tree/master/aspnetcore/fundamentals/configuration/index/_static) and the sample app project files are in [fundamentals/configuration/index/sample](https://github.com/aspnet/Docs/tree/master/aspnetcore/fundamentals/configuration/index/sample). An image in the *fundamentals/configuration/index.md* file is rendered by the following Markdown:
 
-```
+```md
 ![description of image for alt attribute](configuration/index/_static/imagename.png)
 ```
 
@@ -42,13 +42,13 @@ Use lowercase for Markdown file names and image file names.
 
 Internal links should use the `uid` of the target article with an xref link (link text is set to the linked content's title):
 
-```
+```md
 <xref:uid_of_the_topic>
 ```
 
 If the title of the article is unsuitable for link text (for example, a word or phrase in a sentence is the link text), specify the xref link and link text with the following:
 
-```
+```md
 [link text](xref:uid_of_the_topic)
 ```
 
@@ -73,13 +73,13 @@ The following examples illustrate [DFM code snippet syntax](https://dotnet.githu
 
 To render an entire code file as a snippet:
 
-```
+```md
 [!code-csharp[](configuration/index/sample/Program.cs)]
 ```
 
 To render a portion of a file as a snippet by using line numbers:
 
-```
+```md
 [!code-csharp[](configuration/index/sample/Program.cs?range=1-10,20,30,40-50]
 [!code-html[](configuration/index/sample/Views/Home/Index.cshtml?range=1-10,20,30,40-50]
 ```
@@ -88,13 +88,13 @@ For C# snippets, reference a [C# region](https://docs.microsoft.com/dotnet/cshar
 
 To render a C# region named "snippet_Example":
 
-```
+```md
 [!code-csharp[](configuration/index/sample/Program.cs?name=snippet_Example)]
 ```
 
 To highlight selected lines in a rendered snippet (usually renders as yellow background color):
 
-```
+```md
 [!code-csharp[](configuration/index/sample/Program.cs?name=snippet_Example&highlight=1-3,10,20-25)]
 [!code-csharp[](configuration/index/sample/Program.cs?range=10-20&highlight=1-3]
 [!code-html[](configuration/index/sample/Views/Home/Index.cshtml?range=10-20&highlight=1-3]

aspnetcore/fundamentals/localization.md

@@ -70,7 +70,7 @@ A French resource file could contain the following:
 
 | Key | Value |
 | ----- | ------ |
-| `<i>Hello</i> <b>{0}!</b>` | `<i>Bonjour</i> <b>{0} !</b> ` |
+| `<i>Hello</i> <b>{0}!</b>` | `<i>Bonjour</i> <b>{0} !</b>` |
 
 The rendered view would contain the HTML markup from the resource file.
 
@@ -168,7 +168,7 @@ If the root namespace of an assembly is different than the assembly name:
 
 If the `RootNamespace` is different from the `AssemblyName`, include the following in *AssemblyInfo.cs* (with parameter values replaced with the actual values):
 
-```Csharp
+```csharp
 using System.Reflection;
 using Microsoft.Extensions.Localization;
 

aspnetcore/includes/scaffold-identity/id-scaffold-dlg-auth.md

@@ -23,32 +23,32 @@ Note: If you're creating a new user context, you don't have to select a file to
 
 If you have not previously installed the ASP.NET Core scaffolder, install it now:
 
-```cli
+```console
 dotnet tool install -g dotnet-aspnet-codegenerator
 ```
 
 Add a package reference to [Microsoft.VisualStudio.Web.CodeGeneration.Design](https://www.nuget.org/packages/Microsoft.VisualStudio.Web.CodeGeneration.Design/) to the project (\*.csproj) file. Run the following command in the project directory:
 
-```cli
+```console
 dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
 dotnet restore
 ```
 
 Run the following command to list the Identity scaffolder options:
 
-```cli
+```console
 dotnet aspnet-codegenerator identity -h
 ```
 
 In the project folder, run the Identity scaffolder with the options you want. For example, to setup identity with the default UI and the minimum number of files, run the following command. Use the correct fully qualified name for your DB context:
 
-```cli
+```console
 dotnet aspnet-codegenerator identity -dc MyWeb.Data.ApplicationDbContext --files Account.Register
 ```
 
-Powershell uses semicolon as a command separator. When using powershell, escape the semi-colons in the file list or put the file list in double quotes. For example:
+PowerShell uses semicolon as a command separator. When using PowerShell, escape the semi-colons in the file list or put the file list in double quotes. For example:
 
-```cli
+```console
 dotnet aspnet-codegenerator identity -dc MyWeb.Data.ApplicationDbContext --files "Account.Register;Account.Login;Account.Logout"
 ```
 

aspnetcore/signalr/hubs.md

@@ -47,6 +47,7 @@ You can specify a return type and parameters, including complex types and arrays
 
 > [!NOTE]
 > Hubs are transient:
+>
 > * Don't store state in a property on the hub class. Every hub method call is executed on a new hub instance.  
 > * Use `await` when calling asynchronous methods that depend on the hub staying alive. For example, a method such as `Clients.All.SendAsync(...)` can fail if it's called without `await` and the hub method completes before `SendAsync` finishes.
 

aspnetcore/test/integration-tests.md

@@ -305,7 +305,7 @@ Call the [UseSolutionRelativeContentRoot](/dotnet/api/microsoft.aspnetcore.testh
 
 ## Disable shadow copying
 
-Shadow copying causes the tests to execute in a different folder than the output folder. For tests to work properly, shadow copying must be disabled. The [sample app](https://github.com/aspnet/Docs/tree/master/aspnetcore/test/integration-tests/samples) uses xUnit and disables shadow copying for xUnit by including an *xunit.runner.json* file with the correct configuration setting. For more information, see [Configuring xUnit.net with JSON](https://xunit.github.io/docs/configuring-with-json.html).
+Shadow copying causes the tests to execute in a different folder than the output folder. For tests to work properly, shadow copying must be disabled. The [sample app](https://github.com/aspnet/Docs/tree/master/aspnetcore/test/integration-tests/samples) uses xUnit and disables shadow copying for xUnit by including an *xunit.runner.json* file with the correct configuration setting. For more information, see [Configuring xUnit with JSON](https://xunit.github.io/docs/configuring-with-json.html).
 
 Add the *xunit.runner.json* file to root of the test project with the following content:
 

aspnetcore/tutorials/first-mvc-app/adding-model.md

@@ -228,7 +228,7 @@ Open the *Controllers/MoviesController.cs* file and examine the constructor:
 
 [!code-csharp[](~/tutorials/first-mvc-app/start-mvc/sample/MvcMovie22/Controllers/MC1.cs?name=snippet_1)]
 
-The constructor uses [Dependency Injection](xref:fundamentals/dependency-injection) to inject the database context (`MvcMovieContext `) into the controller. The database context is used in each of the [CRUD](https://wikipedia.org/wiki/Create,_read,_update_and_delete) methods in the controller.
+The constructor uses [Dependency Injection](xref:fundamentals/dependency-injection) to inject the database context (`MvcMovieContext`) into the controller. The database context is used in each of the [CRUD](https://wikipedia.org/wiki/Create,_read,_update_and_delete) methods in the controller.
 
 <a name="strongly-typed-models-keyword-label"></a>
 <a name="strongly-typed-models-and-the--keyword"></a>

aspnetcore/tutorials/razor-pages/page.md

@@ -160,7 +160,7 @@ The scaffolding engine creates Razor markup for each field in the model (except
 
 [!code-cshtml[](~/tutorials/razor-pages/razor-pages-start/snapshot_sample/RazorPagesMovie/Pages/Movies/Create.cshtml?range=15-20)]
 
-The [Validation Tag Helpers](xref:mvc/views/working-with-forms#the-validation-tag-helpers) (`<div asp-validation-summary` and ` <span asp-validation-for`) display validation errors. Validation is covered in more detail later in this series.
+The [Validation Tag Helpers](xref:mvc/views/working-with-forms#the-validation-tag-helpers) (`<div asp-validation-summary` and `<span asp-validation-for`) display validation errors. Validation is covered in more detail later in this series.
 
 The [Label Tag Helper](xref:mvc/views/working-with-forms#the-label-tag-helper) (`<label asp-for="Movie.Title" class="control-label"></label>`) generates the label caption and `for` attribute for the `Title` property.