[Bug libstdc++/127219] <format>: make __valid_types_for_check_dynamic_spec static so check_dynamic_spec<Ts...> works with clang and EDG

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127219

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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   Target Milestone|---                         |15.4