[Bug libstdc++/121956] tuple-or-pair to just tuple part was missed from P2165R4

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121956

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
So maybe simply:

--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -5460,9 +5460,7 @@ namespace views::__adaptor
   public:
     using iterator_category = input_iterator_tag;
     using iterator_concept = decltype(_S_iter_concept());
-    using value_type = conditional_t<_Nm == 2,
-                                    pair<range_value_t<_Base>,
range_value_t<_Base>>,
-                                   
__detail::__repeated_tuple<range_value_t<_Base>, _Nm>>;
+    using value_type = __detail::__repeated_tuple<range_value_t<_Base>, _Nm>;
     using difference_type = range_difference_t<_Base>;

     _Iterator() = default;