`fmt::format("{}", x)` resolves through the macro-namespace matcher
(#2176), which took the first same-named function of the namespace -
color.h's `format(const text_style&, format_string, T&&...)` - for all of
fmt's 1,400 `fmt::format` calls, and likewise `print`, `format_to`,
`vformat`.
Among an overload set the call's arguments are now read (to a dozen lines)
and each overload's parameter list from source (C++ signatures are empty):
an argument count outside the parameters' is out; a string-literal argument
fits a parameter that names a string type best, a template parameter
(`const S&`) less, anything else not; a narrow literal never fits a wide
parameter (`wformat_string`, `wstring_view`) nor a wide one a narrow one.
`...` inside `format_string<T...>` is not a pack.
fmt: `format` -> format.h (1,363) and xchar.h for `L"..."` (57),
`format_to`/`print` -> core.h, `vformat` -> format-inl.h; spdlog's bundled
fmt the same; pybind11's `py::set()` -> pytypes.h's `set` class. json,
rapidjson, leveldb unchanged. Edge counts unchanged (targets only).
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Colby Mchenry