Update TOC and pragma tables

Author: Colin Robertson

docs/build/reference/external-external-headers-diagnostics.md

@@ -159,7 +159,7 @@ With this change to the library header, the author of the library ensures that t
 
 ### `system_header` pragma
 
-`#pragma system_header` is an intrusive header marker that allows library writers to mark certain headers as external. A header file containing `#pragma system_header` is considered external from the point of the pragma onward, exactly as if it was in a directory that was specified as external on the command line. The compiler emits any diagnostics after the marker at the warning level specified by **`/external:Wn`**.
+`#pragma system_header` is an intrusive header marker that allows library writers to mark certain headers as external. A header file containing `#pragma system_header` is considered external from the point of the pragma onward, exactly as if it was in a directory that was specified as external on the command line. The compiler emits any diagnostics after the marker at the warning level specified by **`/external:Wn`**. For more information, see [`system_header` pragma](../../preprocessor/system-header-pragma.md).
 
 ### Limitations
 

docs/c-language/c-pragmas.md

@@ -21,38 +21,39 @@ A *pragma* instructs the compiler to perform a particular action at compile time
         [`comment`](../preprocessor/comment-c-cpp.md)\
         [`component`](../preprocessor/component.md)\
         [`const_seg`](../preprocessor/const-seg.md)\
-        [`data_seg`](../preprocessor/data-seg.md)
+        [`data_seg`](../preprocessor/data-seg.md)\
+        [`deprecated`](../preprocessor/deprecated-c-cpp.md)
     :::column-end:::
     :::column:::
-        [`deprecated`](../preprocessor/deprecated-c-cpp.md)\
         [`detect_mismatch`](../preprocessor/detect-mismatch.md)\
         [`fenv_access`](../preprocessor/fenv-access.md)\
         [`float_control`](../preprocessor/float-control.md)\
         [`fp_contract`](../preprocessor/fp-contract.md)\
         [`function`](../preprocessor/function-c-cpp.md)\
         [`hdrstop`](../preprocessor/hdrstop.md)\
         [`include_alias`](../preprocessor/include-alias.md)\
-        [`inline_depth`](../preprocessor/inline-depth.md)
+        [`inline_depth`](../preprocessor/inline-depth.md)\
+        [`inline_recursion`](../preprocessor/inline-recursion.md)
     :::column-end:::
     :::column:::
-        [`inline_recursion`](../preprocessor/inline-recursion.md)\
         [`intrinsic`](../preprocessor/intrinsic.md)\
         [`make_public`](../preprocessor/make-public.md)\
         [`managed`](../preprocessor/managed-unmanaged.md)\
         [`message`](../preprocessor/message.md)\
         [`omp`](../preprocessor/omp.md)\
         [`once`](../preprocessor/once.md)\
         [`optimize`](../preprocessor/optimize.md)\
-        [`pack`](../preprocessor/pack.md)
+        [`pack`](../preprocessor/pack.md)\
+        [`pop_macro`](../preprocessor/pop-macro.md)
     :::column-end:::
     :::column:::
-        [`pop_macro`](../preprocessor/pop-macro.md)\
         [`push_macro`](../preprocessor/push-macro.md)\
         [`region`, `endregion`](../preprocessor/region-endregion.md)\
         [`runtime_checks`](../preprocessor/runtime-checks.md)\
         [`section`](../preprocessor/section.md)\
         [`setlocale`](../preprocessor/setlocale.md)\
         [`strict_gs_check`](../preprocessor/strict-gs-check.md)\
+        [`system_header`](../preprocessor/system-header-pragma.md)\
         [`unmanaged`](../preprocessor/managed-unmanaged.md)\
         [`warning`](../preprocessor/warning.md)
     :::column-end:::

docs/preprocessor/pragma-directives-and-the-pragma-keyword.md

@@ -67,16 +67,17 @@ The Microsoft C and C++ compilers recognize the following pragma directives:
       [`once`](../preprocessor/once.md)\
       [`optimize`](../preprocessor/optimize.md)\
       [`pack`](../preprocessor/pack.md)\
-      [`pointers_to_members`](../preprocessor/pointers-to-members.md) <sup>1</sup>
+      [`pointers_to_members`](../preprocessor/pointers-to-members.md) <sup>1</sup>\
+      [`pop_macro`](../preprocessor/pop-macro.md)
    :::column-end:::
    :::column span="":::
-      [`pop_macro`](../preprocessor/pop-macro.md)\
       [`push_macro`](../preprocessor/push-macro.md)\
       [`region`](../preprocessor/region-endregion.md)\
       [`runtime_checks`](../preprocessor/runtime-checks.md)\
       [`section`](../preprocessor/section.md)\
       [`setlocale`](../preprocessor/setlocale.md)\
       [`strict_gs_check`](../preprocessor/strict-gs-check.md)\
+      [`system_header`](../preprocessor/system-header-pragma.md)\
       [`unmanaged`](../preprocessor/managed-unmanaged.md)\
       [`vtordisp`](../preprocessor/vtordisp.md) <sup>1</sup>\
       [`warning`](../preprocessor/warning.md)

docs/preprocessor/toc.yml

@@ -198,6 +198,8 @@
       href: ../preprocessor/setlocale.md
     - name: strict_gs_check pragma
       href: ../preprocessor/strict-gs-check.md
+    - name: system_header pragma
+      href: ../preprocessor/systeam-header-pragma.md
     - name: vtordisp pragma
       href: ../preprocessor/vtordisp.md
     - name: warning pragma