show type for IdOffsetRange

[jishnub]

This PR attempts to fix #121 . Now we have

julia> a = OffsetArray([1 2; 3 4], -1:0, 5:6)
2×2 OffsetArray(::Array{Int64,2}, -1:0, 5:6) with eltype Int64 with indices -1:0×5:6:
 1  2
 3  4

julia> axes(a)
(OffsetArrays.IdOffsetRange(-1:0), OffsetArrays.IdOffsetRange(5:6))

[jishnub]

This PR alleviates this issue in #120 :

Previously

julia> @test 1:3 === OffsetArrays.IdOffsetRange(1:3)
Test Failed at none:1
  Expression: 1:3 === OffsetArrays.IdOffsetRange(1:3)
   Evaluated: 1:3 === 1:3
ERROR: There was an error during testing

Now

julia> @test 1:3 === OffsetArrays.IdOffsetRange(1:3)
Test Failed at REPL[12]:1
  Expression: 1:3 === OffsetArrays.IdOffsetRange(1:3)
   Evaluated: 1:3 === OffsetArrays.IdOffsetRange(1:3)
ERROR: There was an error during testing

[codecov]

Codecov Report

Merging #143 into master will increase coverage by 2.83%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #143      +/-   ##
==========================================
+ Coverage   90.49%   93.33%   +2.83%     
==========================================
  Files           2        2              
  Lines         221      240      +19     
==========================================
+ Hits          200      224      +24     
+ Misses         21       16       -5     

Impacted Files	Coverage Δ
src/OffsetArrays.jl	93.87% <100.00%> (+3.48%)	⬆️
src/axes.jl	90.90% <100.00%> (ø)

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[johnnychen94]

Thanks for doing this! I was planning to fix these after finishing my little DemoCards project but you certainly did a great job here!

Could possibly add some show tests to capture the patterns as a regression test. The tools I'd personally use isSuppressor.@capture, or ReferenceTests's @io2str/@test_reference.

You're doing great here, feel free to merge if you think it is ready.

[johnnychen94]

FYI you could use git rebase master in showIdOffsetRange branch to keep a clean commit history.

[jishnub]

I think we need to update the docs to reflect this change