Feature Request: Add map!(f, x) to work as map!(f, x, x)

[Ellipse0934]

Currently we have map(f, c...) which applies map to a collection and when the map is supposed to store to a container rather than returning a new one we use map!(f, dest, c...). However, when we have a single container over which we are supposed to apply map, map!(f, x) syntax makes sense. Currently, we do map!(f, x, x).

Example

julia> x = [1., 2, 3]
julia> map!(sqrt, x)
3-element Array{Float64,1}:
 1.0
 1.4142135623730951
 1.7320508075688772

[rfourquet]

Dup of #31677. map!(f, x) was deprecated, and map!(f, x) could also mean fill destination x with repeated applications of "nullary" f() (call of f with 0 arguments).