Add "Remarks" heading for error references in range [C1801, C2000]

Author: Rageking8

docs/error-messages/compiler-errors-1/fatal-error-c1852.md

@@ -10,6 +10,8 @@ ms.assetid: fa011004-b8d6-46f1-ba80-4785e4ce137f
 
 > 'filename' is not a valid precompiled header file
 
+## Remarks
+
 The file is not a precompiled header.
 
 ### To fix by checking the following possible causes

docs/error-messages/compiler-errors-1/fatal-error-c1853.md

@@ -10,6 +10,8 @@ ms.assetid: ceb9b4a5-92bf-4573-8a9f-3109cc7743ce
 
 > '*filename*' precompiled header file is from a previous version of the compiler, or the precompiled header is C++ and you are using it from C (or vice versa)
 
+## Remarks
+
 Possible causes:
 
 - The precompiled header was compiled with a previous compiler version. Try recompiling the header with the current compiler.

docs/error-messages/compiler-errors-1/fatal-error-c1854.md

@@ -10,6 +10,8 @@ ms.assetid: 8c21a9cc-1737-475c-9e57-8725cd8937c1
 
 > cannot overwrite information formed during creation of the precompiled header in object file: '*filename*'
 
+## Remarks
+
 You specified the [/Yu (Use Precompiled Header File)](../../build/reference/yu-use-precompiled-header-file.md) option after specifying the [/Yc (Create Precompiled Header File)](../../build/reference/yc-create-precompiled-header-file.md) option for the same file.
 
 To fix this issue, in general, set only one file in your project to be compiled by using the **/Yc** option, and set all other files to compile by using the **/Yu** option. For details on the use of the **/Yc** option, and how to set it in the Visual Studio IDE, see [/Yc (Create Precompiled Header File)](../../build/reference/yc-create-precompiled-header-file.md). For more information on using precompiled headers, see [Creating Precompiled Header Files](../../build/creating-precompiled-header-files.md).

docs/error-messages/compiler-errors-1/fatal-error-c1900.md

@@ -10,6 +10,8 @@ ms.assetid: 3aaa583b-4c1a-45de-aa34-527d806f2cb5
 
 > Il mismatch between '*tool1*' version '*number1*' and '*tool2*' version '*number2*'
 
+## Remarks
+
 Tools run in various passes of the compiler do not match. *number1* and *number2* refer to the dates on the files. For example, in pass 1, the compiler front end runs (c1.dll) and in pass 2, the compiler back end runs (c2.dll). The dates on the files must match.
 
 To fix this issue, make sure that all updates have been applied to Visual Studio. If the problem persists, use **Programs and Features** in the Windows Control Panel to repair or reinstall Visual Studio.

docs/error-messages/compiler-errors-1/fatal-error-c1902.md

@@ -10,6 +10,8 @@ ms.assetid: 2dc066cc-fcb1-4725-8bcb-9f44dd0905b7
 
 > program database manager mismatch; please check your installation
 
+## Remarks
+
 A program database file (.pdb) was created using a newer version of mspdb*XXX*.dll than the one the compiler found on your system. This error usually indicates that mspdbsrv.exe or mspdbcore.dll are missing or have different versions than mspdb*XXX*.dll. (The *XXX* placeholder in the mspdb*XXX*.dll file name changes with each product release. For example, in Visual Studio 2015, the file name is mspdb140.dll.)
 
 Ensure matching versions of mspdbsrv.exe, mspdbcore.dll, and mspdb*XXX*.dll are installed on your system. Ensure that mismatched versions have not been copied to the directory that contains the compiler and link tools for your target platform. For example, you might have copied the files so you could invoke the compiler or link tool from the command prompt without setting the **PATH** environment variable accordingly.

docs/error-messages/compiler-errors-1/fatal-error-c1903.md

@@ -10,4 +10,6 @@ ms.assetid: 4b4719d6-35d2-4ca5-81ce-903ecd28dfb9
 
 > unable to recover from previous error(s); stopping compilation
 
+## Remarks
+
 The compiler found too many errors to continue. Fix the errors and recompile.

docs/error-messages/compiler-errors-1/fatal-error-c1904.md

@@ -10,6 +10,8 @@ ms.assetid: 10f66015-146f-41a7-8011-327b29dedec8
 
 > bad provider interaction: 'file'
 
+## Remarks
+
 This error indicates the failure of an attribute provider.
 
 Note the circumstances of the error, try to isolate the problem and create a reproducible test case, then contact [Talk to Us](/visualstudio/ide/talk-to-us).

docs/error-messages/compiler-errors-1/fatal-error-c1905.md

@@ -10,6 +10,8 @@ ms.assetid: fefc6769-477f-45a2-9878-6f0a5f42472c
 
 > Front end and back end not compatible (must target same processor)
 
+## Remarks
+
 This error occurs when a .obj file is generated by a compiler front end (C1.dll) that targets one processor, such as x86, ARM, or x64, but is being read by a back end (C2.dll) that targets a different processor.
 
 To fix this issue, ensure that you are using a matching front end and back end. This is the default for projects created in Visual Studio. This error may occur if you have edited the project file and used different paths to the compiler tools. If you have not specifically set the path for the compiler tools, then this error may occur if your Visual Studio installation is corrupt. For example, you may have copied the compiler .dll files from one location to another. Use **Programs and Features** in the Windows Control Panel to repair or reinstall Visual Studio.