Make ranges-test available with C++11#2114

Merged

vitaut merged 2 commits intofmtlib:masterfrom alexezeder:fix/if_constexpr_guard_in_ranges_test

Jan 30, 2021

+99-89

Commits on Jan 23, 2021

make ranges-test available with C++11, fix problem with some gcc versions
alexezeder
committed
potentially fix build for MSVC 19.10, a bit reorganizing in test
alexezeder
committed