[Bug c++/78010] --Wsuggest-override reports a redundant warning on a 'final' method

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78010

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rh-override
says that virtual functions should use exactly one of virtual, override or
final. Which agrees with the suggestion to not warn about functions that
already specify final.