LWG2376 bad_weak_ptr::what() overspecified
LWG2365 Missing noexcept in shared_ptr::shared_ptr(nullptr_t)
LWG2233 bad_function_call::what() unhelpful
LWG2266 vector and deque have incorrect insert requirements

    Also add space after Requires:.
LWG2230 "see below" for initializer-list constructors of unordered containers
LWG2106 move_iterator wrapping iterators returning prvalues
LWG2217 operator==(sub_match, string) slices on embedded '\0's