libstdc++: Add missing noexcept to lazy_split_view iterator (LWG 3593)

This was approved at the October 2021 plenary. We already have noexcept
in the other places the issue adds it in the spec.

libstdc++-v3/ChangeLog:

	* include/std/ranges (ranges::lazy_split_view::_InnerIter::end()):
	Add neoxcept (LWG 3593).

diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index 780a363..ac85907 100644 (file)
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -3066,7 +3066,7 @@ namespace views::__adaptor
            { return _InnerIter<_Const>{_M_i}; }
 
            constexpr default_sentinel_t
-           end() const
+           end() const noexcept
            { return default_sentinel; }
          };