kwargs printing is not quite accurate in stacktraces

[vtjnash]

I thought we perhaps used to print kwargs..., but right now we seem to print something quite awkwardly overcomplicated:

remotecall_fetch(::Function, ::Distributed.Worker, ::Distributed.RRID, ::Vararg{Any, N} where N;
    kwargs::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})

vs.

julia> methods(Distributed.remotecall_fetch)
...
remotecall_fetch(f, w::Distributed.Worker, args...; kwargs...) in Distributed at /data/vtjnash/julia/usr/share/julia/stdlib/v1.6/Distributed/src/remotecall.jl:383
...

[JeffBezanson]

I think the reason this happens is that it's printing the types of actual arguments available within the method. In this case there is indeed a kwargs argument of type Base.Iterators.Pairs, so it's not wrong. In contrast, the output of methods() is showing the declared signature.