Add "Remarks" and "Example" headings for error references in range [C2981, C3010]

Author: Rageking8

docs/error-messages/compiler-errors-2/compiler-error-c2988.md

@@ -10,4 +10,6 @@ ms.assetid: c07ada8d-7cdf-4496-8656-cc3851e76b46
 
 > unrecognizable template declaration/definition
 
+## Remarks
+
 The template declaration does not parse correctly. Check delimiters.

docs/error-messages/compiler-errors-2/compiler-error-c2989.md

@@ -10,8 +10,12 @@ ms.assetid: 936303d8-eb3b-4746-82ec-2f18020a6f64
 
 > 'class' : class type has already been declared as a non-class type
 
+## Remarks
+
 The class generic or template redefines a non-template or non-generic class. Check header files for conflicts.
 
+## Examples
+
 The following sample generates C2989:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c2990.md

@@ -10,8 +10,12 @@ ms.assetid: 674e9f6a-6743-4af0-a7ed-cbe11103a2f8
 
 > 'class' : non-class type as already been declared as a class type
 
+## Remarks
+
 The non generic or template class redefines a generic or template class. Check header files for conflicts.
 
+## Examples
+
 The following sample generates C2990:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c2991.md

@@ -10,8 +10,12 @@ ms.assetid: a87e4404-26e8-4927-b3ee-5d02b3b8bee1
 
 > redefinition of type parameter 'parameter'
 
+## Remarks
+
 There was a type conflict between two generic or template definitions of `parameter`. When defining multiple generic or template parameters, you must use equivalent types.
 
+## Examples
+
 The following sample generates C2991:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c2992.md

@@ -10,9 +10,11 @@ ms.assetid: 01b16447-43fe-4e91-9a5a-af884a166a31
 
 > 'class' : invalid or missing type parameter list
 
+## Remarks
+
 The class is preceded by a **`template`** or **generic** keyword with missing or invalid parameters.
 
-## Example
+## Examples
 
 The following sample generates C2992:
 

docs/error-messages/compiler-errors-2/compiler-error-c2993.md

@@ -9,9 +9,13 @@ helpviewer_keywords: ["C2993"]
 
 > 'identifier' : illegal type for non-type template parameter 'parameter'
 
+## Remarks
+
 - Prior to C++20, you cannot declare a template with a structure, class, or union argument. Pointers can be used in place of these types as template parameters.
 - Since C++20, structure, class, or unions *can* be used as non-type template parameters. A non-type template parameter can't be a rvalue reference type or a parameter pack of rvalue types.
 
+## Examples
+
 The following sample generates C2993:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c2994.md

@@ -10,4 +10,6 @@ ms.assetid: b03570b5-e5fd-41d8-bdf1-dfadc2b1e116
 
 > unnamed class in template parameter list
 
+## Remarks
+
 You cannot use the **`class`** keyword as a template argument without specifying a class name.

docs/error-messages/compiler-errors-2/compiler-error-c2995.md

@@ -10,8 +10,12 @@ ms.assetid: a57cdfe0-b40b-4a67-a95c-1a49ace4842b
 
 > 'function' : function template has already been defined
 
+## Remarks
+
 Make sure that there is only one definition for each member function of a templated class.
 
+## Example
+
 The following sample generates C2995:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c2996.md

@@ -10,4 +10,6 @@ ms.assetid: f0ca9f8b-1751-4182-adab-1424f0c5e0c0
 
 > 'function' : recursive function template definition
 
+## Remarks
+
 A function definition attempts to instantiate its root templated class. Recursive template instantiations are not allowed.

docs/error-messages/compiler-errors-2/compiler-error-c3001.md

@@ -10,8 +10,12 @@ ms.assetid: d0e03478-1b44-47e5-8f5b-70415fa1f8bc
 
 > 'error_text' : expected an OpenMP directive name
 
+## Remarks
+
 The `omp` pragma must be followed by a directive.
 
+## Example
+
 The following sample generates C3001:
 
 ```c