[libc++] Use variable templates in is_floating_point

[philnik777]

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git-clang-format --diff origin/main HEAD --extensions h -- libcxx/include/__type_traits/is_floating_point.h --diff_from_common_commit

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diff --git a/libcxx/include/__type_traits/is_floating_point.h b/libcxx/include/__type_traits/is_floating_point.h
index 17e6e0281..07f2ec100 100644
--- a/libcxx/include/__type_traits/is_floating_point.h
+++ b/libcxx/include/__type_traits/is_floating_point.h
@@ -31,7 +31,7 @@ struct _LIBCPP_NO_SPECIALIZATIONS is_floating_point
     : integral_constant<bool, __is_floating_point_impl<__remove_cv_t<_Tp> > > {};
 
 #if _LIBCPP_STD_VER >= 17
-template<class _Tp>
+template <class _Tp>
 inline constexpr bool is_floating_point_v = __is_floating_point_impl<__remove_cv_t<_Tp>>;
 #endif