show eltype for Zeros/Ones

[jishnub]

This changes the way Zeros and Ones are displayed compactly:
On master

julia> (Zeros{Int}(2),)
(Zeros(2),)

This PR

julia> (Zeros{Int}(2),)
(Zeros{Int64}(2),)

After this, the output represents a valid constructor for the displayed object.

[codecov]

Codecov Report

Merging #283 (2e0ed3b) into master (41715aa) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #283   +/-   ##
=======================================
  Coverage   99.88%   99.88%           
=======================================
  Files           5        5           
  Lines         851      857    +6     
=======================================
+ Hits          850      856    +6     
  Misses          1        1           

Files Changed	Coverage Δ
src/FillArrays.jl	99.73% <100.00%> (+<0.01%)	⬆️

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[dlfivefifty]

I disagree this is need. The current behaviour is much easier to read

[jishnub]

This makes it much easier to debug. While the current behaviour is easier to read, the convenience of copying and pasting output is significant, especially downstream

[dlfivefifty]

oh sorry I misunderstood what this was doing.