Update c26447.md

Add description metadata, style fixes, Acrolinx.

Author: Colin Robertson

docs/code-quality/c26447.md

@@ -1,25 +1,29 @@
 ---
 title: C26447
-ms.date: 03/22/2018
+description: "Microsoft C++ Code Analysis warning C26447 for the C++ Core Guidelines case F.6."
+ms.date: 08/25/2020
 ms.topic: reference
 f1_keywords: ["C26447"]
 helpviewer_keywords: ["C26447"]
 ---
 # C26447 DONT_THROW_IN_NOEXCEPT
 
-The function is declared **`noexcept`** but calls a function that may throw exceptions.
+> The function is declared `noexcept` but calls function *function_name* that may throw exceptions (f.6).
 
-C++ Core Guidelines:
+C++ Core Guidelines:\
 [F.6: If your function may not throw, declare it noexcept](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#f6-if-your-function-may-not-throw-declare-it-noexcept).
 
-This rule amends another rule, [C26440 DECLARE_NOEXCEPT](c26440.md), which tries to find functions that are good candidates to be marked as **`noexcept`**. In this case, the idea is that once some function is marked as **`noexcept`**, it must keep its contract by not invoking other code that may throw exceptions.
+## Remarks
+
+This rule amends another rule, [C26440 DECLARE_NOEXCEPT](c26440.md), which tries to find functions that are good candidates to mark as **`noexcept`**. In this case, the idea is that once you mark some function as **`noexcept`**, it must keep its contract by not invoking other code that may throw exceptions.
 
 - The Microsoft C++ compiler already handles straightforward violations like **`throw`** statements in the function body (see [C4297](/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4297)).
-- The rule focuses only on function calls. It flags targets that are not **`constexpr`** and that can potentially throw exceptions; in other words they are not marked explicitly as non-throwing by using **`noexcept`**, **`__declspec(nothrow)`**, **throw()**.
+- The rule focuses only on function calls. It flags targets that aren't **`constexpr`** and that can potentially throw exceptions. In other words, they aren't marked explicitly as non-throwing by using **`noexcept`**, **`__declspec(nothrow)`**, or **throw()**.
 - The compiler-generated target functions are skipped to reduce noise since exception specifications are not always provided by the compiler.
-- The checker also skips special kinds of target functions that are expected to be implemented as **`noexcept`**; this rule is enforced by [C26439 SPECIAL_NOEXCEPT](c26439.md).
+- The checker also skips special kinds of target functions we expect you to implement as **`noexcept`**; this rule is enforced by [C26439 SPECIAL_NOEXCEPT](c26439.md).
 
 ## Example
+
 ```cpp
 #include <vector>
 #include <string>
@@ -33,4 +37,9 @@ std::vector<std::string> collect(std::istream& is) noexcept
     return res;
 }
 ```
-You can fix these warnings by removing noexcept from the function signature.
+
+You can fix these warnings by removing **`noexcept`** from the function signature.
+
+## See also
+
+[C26440 DECLARE_NOEXCEPT](c26440.md)