Deprecation warnings from Atom with v1.7

Tooling
3

I’m getting this error too. Here’s a minimal example:

let
    foo::Tuple{Vararg{<:Number}} = (1,2,3,4)
end
ERROR: Wrapping `Vararg` directly in UnionAll is deprecated (wrap the tuple instead).
Stacktrace:
 [1] UnionAll(v::TypeVar, t::Any)
   @ Core .\boot.jl:255
 [2] top-level scope
   @ none:2

What’s changed? What am Imeant to do about it?

Why6 aren’t deprecation warnings more informative?