f68a536a67
LWG3839 range_formatter's set_separator, set_brackets, and
underlying functions should be noexcept
Adds tests for:
template<ranges::input_range R, class charT>
struct range-default-formatter<range_format::sequence, R, charT>
These were missing, the format functions tests for the sequences
are already present.
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D144286