Merge pull request #4862 from Rageking8/fix-invalid-nodiscard-attribute

Fix invalid nodiscard attribute

Author: Court72

docs/standard-library/ambiguous-local-time.md

@@ -98,7 +98,7 @@ You typically won't create this exception. It's thrown by functions that convert
 Gets a string describing the details of the ambiguity.
 
 ```cpp
-[nodiscard] virtual const char* what() const noexcept;
+[[nodiscard]] virtual const char* what() const noexcept;
 ```
 
 ### Return value

docs/standard-library/nonexistent-local-time.md

@@ -94,7 +94,7 @@ You typically won't create this exception. It's thrown by functions that convert
 Gets a string describing why the time is non-existent.
 
 ```cpp
-[nodiscard] virtual const char* what() const noexcept;
+[[nodiscard]] virtual const char* what() const noexcept;
 ```
 
 ### Return value

docs/standard-library/subrange-class.md

@@ -332,7 +332,7 @@ Returns `true` if the `subrange` has no elements. Otherwise, returns `false`.
 Get the sentinel at the end of the `subrange`
 
 ```cpp
-[[NODISCARD]] constexpr S end() const;
+[[nodiscard]] constexpr S end() const;
 ```
 
 ### Parameters