More compact array representation

[atombender]

This gets old fast:

       Source: &json.RawMessage{
          123,
          34,
          97,
          103,
          101,
          110,
          116,
          95,
          117,
          105,
          100,
          34,
...

We should emit arrays in a compact way for primitive types such as bytes.

[komuw]

I would also add something besides compactness; for arrays & slices we should show only the first N items.

for example, delve(the debugger) does this:

(dlv) p mySlice

[]int len: 10000, cap: 12288, [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,...+9936 more]

[atombender]

True. The goal with Litter is to give an accurate representation of all the data, but I guess this could be a configuration option.

[komuw]

regarding compactness, should it also apply to arrays/slices that are inside other types?

type House struct {
	Name   string
	Chairs []string // Should this be compacted?
}