`show(::OffsetArrays.IdOffsetRange` should show its type

[goretkin]

import OffsetArrays

julia> Base.OneTo(3)
Base.OneTo(3)

julia> Base.IdentityUnitRange(1:3)
Base.IdentityUnitRange(1:3)

julia> OffsetArrays.IdOffsetRange(1:3)
1:3

I think this might be misleading, as I mentioned in #120 (comment)

[jishnub]

I second this, mind submitting a PR?

[johnnychen94]

It is a good argument. However, I'm not very positive to this:

Before:

julia> Ao = zeros(-3:3, -3:3)
7×7 OffsetArray(::Array{Float64,2}, -3:3, -3:3) with eltype Float64 with indices -3:3×-3:3:
...

julia> axes(Ao)
(-3:3, -3:3)

After: (pretty hard to get the necessary axes information)

julia> Ao = zeros(-3:3, -3:3)
7×7 OffsetArray(::Array{Float64,2}, OffsetArrays.IdOffsetRange(-3:3), OffsetArrays.IdOffsetRange(-3:3)) with eltype Float64 with indices OffsetArrays.IdOffsetRange(-3:3)×OffsetArrays.IdOffsetRange(-3:3):
...

julia> axes(Ao)
(OffsetArrays.IdOffsetRange(-3:3), OffsetArrays.IdOffsetRange(-3:3))

[jishnub]

The summary might be modified to use a compact notation, displaying only the indices and not the type. Displaying the type in axes is actually in line with the Base behavior.

julia> axes(zeros(4,4))
(Base.OneTo(4), Base.OneTo(4))

[timholy]

How about -3ₒₐ:3ₒₐ 😆

[johnnychen94]

Unfortunately, -3ₒₐ in Julia is parsed as -3 * ₒₐ so no. 😆