News and compat annotation for #29178 (Future.copy! to Base).

NEWS.md

@@ -63,6 +63,7 @@ Standard library changes
   * New `edit(m::Module)` method which opens the main source file for module `m` ([#29636]).
   * `Base.@kwdef` can now be used for parametric structs, and for structs with supertypes ([#29316]).
   * `merge(::NamedTuple, ::NamedTuple...)` can now be used with more than 2 `NamedTuple`s ([#29259]).
+  * `Future.copy!` has been moved to `Base` ([#29178]).
 
 Compiler/Runtime improvements
 -----------------------------

base/abstractarray.jl

@@ -647,6 +647,10 @@ If `dst` and `src` are of the same type, `dst == src` should hold after
 the call. If `dst` and `src` are multidimensional arrays, they must have
 equal [`axes`](@ref).
 See also [`copyto!`](@ref).
+
+!!! compat "Julia 1.1"
+    This method requires at least Julia 1.1. In Julia 1.0 this method
+    is available from the `Future` standard library as `Future.copy!`.
 """
 copy!(dst::AbstractVector, src::AbstractVector) = append!(empty!(dst), src)
 

stdlib/Future/src/Future.jl

@@ -15,7 +15,10 @@ using Random
     Future.copy!(dst, src) -> dst
 
 Copy `src` into `dst`.
-This function has now been moved into `Base`, consider using `copy!(dst, src)` instead.
+
+!!! compat "Julia 1.1"
+    This function has moved to `Base` with Julia 1.1, consider using `copy!(dst, src)` instead.
+    `Future.copy!` will be deprecated in the future.
 """
 copy!(dst::AbstractSet, src::AbstractSet) = Base.copy!(dst, src)
 copy!(dst::AbstractDict, src::AbstractDict) = Base.copy!(dst, src)