Proposed new feature or change:

Currently the first degree of the indeterminate variable in polynomials is displayed as x**1:

>>> import numpy.polynomial as poly
>>> str(poly.Polynomial([1,2,3]))
'1.0 + 2.0·x¹ + 3.0·x²'

Usually the first degree is not written. It is suggested to omit the degree for the term with the power of one:

>>> import numpy.polynomial as poly
>>> str(poly.Polynomial([1,2,3]))
'1.0 + 2.0·x + 3.0·x²'

In Latex representation it is displayed correctly, so there is nothing to be done:

Numpy version: master branch