Remove spurious exclamation mark

xml/issue4050.xml

@@ -35,7 +35,7 @@ auto take_and_drop = std::views::drop(5)
 
 // The type of iota is drop_view<take_view<drop_view<take_view<drop_view<iota_view<int, unreachable_sentinel_t>>>>>>, which is indeed a template bloat.
 auto iota = std::views::iota(0) | take_and_drop;
-static_assert(!std::ranges::sized_range&lt;decltype(iota)&gt;); // <span style="color:red;font-weight:bolder">failed</span>
+static_assert(std::ranges::sized_range&lt;decltype(iota)&gt;); // <span style="color:red;font-weight:bolder">failed</span>
 
 // The type of repeat is simply std::ranges::repeat_view&lt;int, long&gt;
 std::ranges::sized_range auto repeat = std::views::repeat(0) | take_and_drop; // ok