Fix markdownlint warnings

.github/workflows/dotnet.yml

@@ -10,6 +10,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    timeout-minutes: 30
+
     steps:
     - uses: actions/checkout@v4
     - name: Setup .NET SDK

.github/workflows/markdownlint.yml

@@ -0,0 +1,19 @@
+name: Markdown Lint CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: DavidAnson/markdownlint-cli2-action@v19
+      with:
+        globs: 'doc/rules/*.md'

.markdownlint.json

@@ -0,0 +1,12 @@
+{
+  "no-duplicate-heading": {
+    "siblings_only": true
+  },
+  "MD033": {
+    "allowed_elements": [
+      "a",
+      "div"
+    ]
+  },
+  "MD041": false
+}

doc/rules/ByteOrderMark.md

@@ -56,7 +56,8 @@ parent directory, respectively). So, for example, the pattern
 
 Note that the pattern matching is performed with the relative paths to the
 directory containing the configuration file `StyleChecker.xml`, so if the
-pattern starts with a slash, it does not match any file. It is recommended to place the configuration file in the project root directory.
+pattern starts with a slash, it does not match any file. It is recommended to
+place the configuration file in the project root directory.
 
 The pattern can contain an asterisk ('`*`') character as a wildcard,
 which matches any character other than a slash zero or more times.

doc/rules/DiscardingReturnValue.md

@@ -182,8 +182,8 @@ return value must not be ignored. The value of `id` attribute
 must represent the fully-qualified type name (of the type containing it)
 followed by its name and parameter types as follows:
 
-```
-FullyQualifiedTypeName.MethodName(ParameterTypeName1, ParameterTypeName2, ...)
+```csharp
+FullyQualifiedTypeName.MethodName(ParameterTypeName1, ParameterTypeName2, …)
 ```
 
 The type name must be fully-qualified,

doc/rules/NoDocumentation.md

@@ -48,6 +48,7 @@ public void Foo()
 
 To do so, edit `StyleChecker.xml` file as follows:
 
+<!-- markdownlint-disable MD013 -->
 ```xml
 <?xml version="1.0" encoding="utf-8" ?>
 <config xmlns="https://maroontress.com/StyleChecker/config.v1">
@@ -58,6 +59,7 @@ To do so, edit `StyleChecker.xml` file as follows:
   ⋮
 </config>
 ```
+<!-- markdownlint-enable MD013 -->
 
 Further more, for example, if you would like ignore test classes wholly
 (namely, ignore them and all they contain) like the following code:

doc/rules/NoSingleSpaceAfterTripleSlash.md

@@ -1,4 +1,3 @@
-<!-- markdownlint-disable MD024 MD033 MD041-->
 <div class="project-logo">StyleChecker</div>
 <div id="toc-level" data-values="H2,H3"></div>
 

doc/rules/NotOneShotInitialization.md

@@ -224,6 +224,7 @@ public void Baz()
     ...
 }
 ```
+
 > [Run][example-2]
 
 Or more simply, you can also use a tuple containing the action of type `Action`

doc/rules/TypeClassParameter.md

@@ -62,14 +62,13 @@ invokes the original version of `Print` with an argument other than the
 `typeof()` operator whose operand is not a `static` class, because it is
 unable to replace the parameter `type` with a type parameter `T`.
 
-> ### Restriction
+> 🚧 **Restriction**
 >
 > This analyzer can only diagnose local functions and private methods
 > with the Visual Studio 2019 editor.
 > To diagnose non-private methods with Visual Studio 2019,
 > perform Build Solution or Analysis ➜ Run Code Analysis.
 
-
 ## Code fix
 
 The code fix provides the option of replacing the parameter with a type
@@ -108,7 +107,7 @@ public void Invoke()
 }
 ```
 
-> ### Remarks
+> 🚨 **Remarks**
 >
 > If a type has both `DoSomething<T>()` and `DoSomething(Type)` methods
 > at the same time, the code fix provider renames `DoSomething<T>`

doc/rules/UnnecessaryUsing.md

@@ -27,7 +27,7 @@ Warning
 implement [IDisposable][system.idisposable] but dispose of nothing.
 See the note of them \[[1](#ref1)\], which is quoted as follows:
 
-> #### Note
+> **Note**
 >
 > This type implements the `IDisposable` interface, but does not actually
 > have any resources to dispose. This means that disposing it by directly