Add blockquotes for error messages in range [C1021, C1050]

Author: Rageking8

docs/error-messages/compiler-errors-1/fatal-error-c1021.md

@@ -8,7 +8,7 @@ ms.assetid: e23171f4-ca6b-40c0-a913-a2edc6fa3766
 ---
 # Fatal Error C1021
 
-invalid preprocessor command 'string'
+> invalid preprocessor command 'string'
 
 `string` is not a valid [preprocessor directive](../../preprocessor/preprocessor-directives.md). To resolve the error, use a valid preprocessor name for `string`.
 

docs/error-messages/compiler-errors-1/fatal-error-c1022.md

@@ -8,7 +8,7 @@ ms.assetid: edada720-dc73-49bc-bd93-a7945a316312
 ---
 # Fatal Error C1022
 
-expected #endif
+> expected #endif
 
 An `#if`, `#ifdef`, or `#ifndef` directive has no matching `#endif` directive. Be sure each `#if`, `#ifdef`, or `#ifndef` has a matching `#endif`.
 

docs/error-messages/compiler-errors-1/fatal-error-c1023.md

@@ -8,7 +8,7 @@ ms.assetid: 727b4070-7474-420b-ab11-6530f96c794f
 ---
 # Fatal Error C1023
 
-'file' : unexpected error with pch, try rebuilding the pch
+> 'file' : unexpected error with pch, try rebuilding the pch
 
 C1023 could be caused by one of several problems, the solution to which is a rebuild of the precompiled header file.
 

docs/error-messages/compiler-errors-1/fatal-error-c1026.md

@@ -8,7 +8,7 @@ ms.assetid: 89bb9d40-673a-44aa-a9f4-b42c07b49d44
 ---
 # Fatal Error C1026
 
-parser stack overflow, program too complex
+> parser stack overflow, program too complex
 
 The space required to parse the program caused a compiler stack overflow.
 

docs/error-messages/compiler-errors-1/fatal-error-c1033.md

@@ -8,6 +8,6 @@ ms.assetid: 09976c03-8450-4cf7-8b43-1b91c2c2b9f9
 ---
 # Fatal Error C1033
 
-cannot open program database pdb
+> cannot open program database pdb
 
 This error can be caused by a disk error, a temporary lock created by an anti-virus program, a previous debugger instance that has not fully shut down, or parallel build mspdbsrv.exe processes that attempt to access the same file, among other possible causes.

docs/error-messages/compiler-errors-1/fatal-error-c1035.md

@@ -8,6 +8,6 @@ ms.assetid: 28cdccee-4377-4823-a4d8-89ca7229a83e
 ---
 # Fatal Error C1035
 
-expression too complex; simplify expression
+> expression too complex; simplify expression
 
 The compiler could not generate code for a complex expression. Split the expression into simpler expressions and recompile.

docs/error-messages/compiler-errors-1/fatal-error-c1037.md

@@ -8,7 +8,7 @@ ms.assetid: 79103bca-ccfb-42e7-aef9-9b90c15b162f
 ---
 # Fatal Error C1037
 
-cannot open object file filename
+> cannot open object file filename
 
 The object file specified by [/Fo](../../build/reference/fo-object-file-name.md) cannot be opened.
 

docs/error-messages/compiler-errors-1/fatal-error-c1045.md

@@ -8,6 +8,6 @@ ms.assetid: 766c2f89-4ecd-4281-adaa-14b270cc0829
 ---
 # Fatal Error C1045
 
-compiler limit : linkage specifications nested too deeply
+> compiler limit : linkage specifications nested too deeply
 
 Nested externals exceed the compiler limit. Nested externals are allowed with the external linkage type, such as **`extern`** "C++". Reduce the number of nested externals to resolve the error.

docs/error-messages/compiler-errors-1/fatal-error-c1046.md

@@ -8,6 +8,6 @@ ms.assetid: 822ec5f5-b0b0-4711-99e1-fc237b619af6
 ---
 # Fatal Error C1046
 
-compiler limit : structure nested too deeply
+> compiler limit : structure nested too deeply
 
 The structure, union, or class exceeded the nesting limit, which is 15 levels. Rewrite the definition to reduce the nesting level. Split the structure, union, or class into two or more parts by using **`typedef`** to define one or more of the nested structures.