[Bug c++/65047] [c++17] Add support for nested namespace defintions.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65047

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Keywords|                            |rejects-valid
           Severity|minor                       |enhancement