New error code and condition, I202

[pgjones]

As newlines represent a change of import grouping, additional newlines should be considered incorrect. For example,

import asyncio

import secrets

Should raise a I202 as the newline does not represent an acceptable newline location (as the grouping is the same).

[mitar]

Yes, this surprised me as well. One can add random newlines and it does not complain.