print binary operations one element nested arrays

[mtar]

Description
A clear and concise description of the bug and the associated functionality.

Printing the result of an arithmetic operations does not work with DNDarrays when at least one operand contains a nested array.
The problem seems to be the resulting array.

To Reproduce
Steps to reproduce the behavior:

1. Which module/class/function is affected?
   print, _ operations.__binary_op
2. What are the circumstances under which the bug appears?
   binary_op on distributed + nested array with one element and print
3. What is the exact error message / erroneous behavior?
   RecursionError: maximum recursion depth exceeded while calling a Python object

Expected behavior
A clear and concise description of what you expected to happen.
Print result

Illustrative
If applicable, add screenshots or minimal examples to help explain your problem.

a = ht.array([[2]], split=0) + ht.array([[1]], split=0)
print(a) # Error
print(a.larray, a.shape) # [1,0]<stdout>:tensor([[3]]) (1, 1); [1,1]<stdout>:tensor([[3]]) (1, 1)

Version Info
Which version are you using?
master 45d4a00
Additional comments
Any other comments here.