Message 120866 - Python tracker

Could 2to3 without -p notice more cases of print(single argument),
to avoid slapping another () around them?  For example:

  print(2*3)
  print(", ".join(dir))
  print(very + long
        + single + argument)

My internal bug detector zooms in on ((foo)) when I read Python code -
I'm seeing code where something was apparently left out, maybe an inner
comma to make it a tuple.

[Copied from Issue10070.]