Update examples in manual using jl_

[omus]

While updating the doctests I found that the jl_ function as mentioned in the manual produces different output between 0.4 and 0.5:

Julia 0.4.6

julia> jl_(x) = ccall(:jl_, Void, (Any,), x)
jl_ (generic function with 1 method)

julia> candid{T}(A::Array{T}, x::T) = 0
candid (generic function with 1 method)

julia> jl_(first(methods(candid)))
Method(sig=Tuple{Array{#T<:Any, N<:Any}, #T<:Any}, va=false, isstaged=false, tvars=#T<:Any, func=#<function>, invokes=nothing, next=nothing)

Julia 0.5-dev

julia> jl_(x) = ccall(:jl_, Void, (Any,), x)
jl_ (generic function with 1 method)

julia> candid{T}(A::Array{T}, x::T) = 0
candid (generic function with 1 method)

julia> jl_(first(methods(candid)))
Main.candid(...)

[yuyichao]

I believe the change is intentional and this is not a regression. The old printing is almost useless since it prints all the linked methods. It might be useful to print other fields though.

[omus]

Ok. Since the change is intentional then someone will need to update the devdocs type section that uses jl_ to show TypeVar information.

[tkelman]

I think Jeff fixed this one in a8d7963 by adding .sig. Do you think that's enough to close this @omus?

[omus]

I think the .sig solution is good enough.