`immutables.Map.__str__` doesn't match `dict.__str__`

[rowillia]

In [7]: d = {'a': 1}

In [8]: str(d)
Out[8]: "{'a': 1}"

In [9]: str(immutables.Map(d))
Out[9]: "<immutables.Map({'a': 1}) at 0x108ed56c0>"

[1st1]

Yeah, I can fix this. What's the use case btw?

[rowillia]

I'm replacing some dict instances with immutables.Map and we're logging the dictionary in places using __str__.

[ofek]

This would help us as well for the same exact use case.