Strange behavior while displaying recursive

[mattn]

---------------
let a = {}
let a["a"] = a
echo a
{'a': {...}}
---------------

This is OK.

---------------
let a = {}
echo [a,a,a]
[{}, {...}, {...}]
---------------

This is NG. Should be [{}, {}, {}]

---------------
echo repeat([[]], 3)
[[],[...],[...]]
---------------

This is also NG. Should be [[], [], []]
Below is a patch to fix this.

https://gist.github.com/mattn/0e0f100a347ec88be19e

- Yasuhiro Matsumoto

[Bram Moolenaar]

I'm not quite sure this is right. Consider this:

let a = {"one": "yes", "two": "yes", "three": "yes"}
echo [a,a,a]

Before the change it would output:
[{'one': 'yes', 'two': 'yes', 'three': 'yes'}, {...}, {...}]

After the change:
[{'one': 'yes', 'two': 'yes', 'three': 'yes'}, {'one': 'yes', 'two': 'yes', 'thr
ee': 'yes'}, {'one': 'yes', 'two': 'yes', 'three': 'yes'}]

It repeats the same thing several times.

What we could do is to avoid the "..." when the list or dict is empty.

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[mattn]

I'm thinking, string(x) is possible to eval if it don't have recursive references.
Anyone, how do you think?