[2025-11 LWG Motion 3] P3016R6 Resolve inconsistencies in begin/end for valarray and braced initializer lists

[jensmaurer]

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3016r6.html

[AlisdairM]

If no-one else has this, I will take it next.