Python interpreter should put spaces around operators in return values of complex numbers. If you give it
>>> 1 + 2j
it should return
(1 + 2j)
and not the current
(1+2j)

My argument is that complex numbers are written like this, with spaces surrounding operators. Wikipedia has multiple instances of the complex number writren, and it's x + yi (in our world it's x + yj but you get the point and you can see that there are spaces around the operator). Please fix the tokenizer to do the right thing.