while else bug

[rocky]

This program when compiled doesn't decompile

# From idlelib/PyParse.py
# Bug is "if" inside a nested while/else.
def _study1(i, n):
    while i:
        while i:
            i = 0
        else:
            if i:
                i = 1

It may be as simple as adding and 'l' in two grammar rules to fix this. See rocky/python-uncompyle6@c6e20e4