finish revamp

Author: simonbyrne

NEWS.md

@@ -902,6 +902,9 @@ Deprecated or removed
     argument instead of defaulting to using the first dimension unless there is only
     one dimension ([#24684], [#25457]).
 
+  * `cumsum` and `cumprod` have the same promotion behaviour for small integer types as `sum` and
+    `prod`. Use `accumulate(+, x)`/`accumulate(*,x)` to get non-promoting behaviour ([#25766]).
+
   * The `sum_kbn` and `cumsum_kbn` functions have been moved to the
     [KahanSummation](https://github.com/JuliaMath/KahanSummation.jl) package ([#24869]).
 
@@ -1260,4 +1263,5 @@ Command-line option changes
 [#25622]: https://github.com/JuliaLang/julia/issues/25622
 [#25634]: https://github.com/JuliaLang/julia/issues/25634
 [#25654]: https://github.com/JuliaLang/julia/issues/25654
-[#25655]: https://github.com/JuliaLang/julia/issues/25655
+[#25655]: https://github.com/JuliaLang/julia/issues/25655
+[#25766]: https://github.com/JuliaLang/julia/issues/25766