Update compiler-warning-c4394.md

Author: Rastaban

docs/error-messages/compiler-warnings/compiler-warning-c4394.md

@@ -9,7 +9,7 @@ helpviewer_keywords: ["C4394"]
 
 > 'function' : per-appdomain symbol should not be marked with __declspec(dllexport)
 
-A function marked with the [appdomain](../../cpp/appdomain.md) **`__declspec`** modifier is compiled to MSIL (not native), and export tables ([export](../../windows/attributes/export.md) **`__declspec`** modifier) aren`t supported for managed functions.
+A function marked with the [appdomain](../../cpp/appdomain.md) **`__declspec`** modifier is compiled to MSIL (not native), and export tables ([export](../../windows/attributes/export.md) **`__declspec`** modifier) are not supported for managed functions.
 
 You can declare a managed function to have public accessibility. For more information, see [Type visibility](../../dotnet/how-to-define-and-consume-classes-and-structs-cpp-cli.md#BKMK_Type_visibility) and [Member visibility](../../dotnet/how-to-define-and-consume-classes-and-structs-cpp-cli.md#BKMK_Member_visibility).