[Bug middle-end/82798] Inconsistent descriptions for warning options in documentation

[julien at trigofacile dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82798

--- Comment #2 from Julien ÉLIE <julien at trigofacile dot com> ---
Other points:

6/ -Wsuggest-final-types and -Wsuggest-final-methods should be mentioned for
C++ (and maybe Objective-C++) only.

7/ -Wc++11-compat and -Wc++14-compat are present in the -Wall list but without
the mention for C++ and Objective-C++.  I believe it should be mentioned.