🪲 Allow list access to appear on lhs of and/or conditions

[boryanagoncharenko]

Fixes #5398
In level 17, the OR and AND conditions could not have a list access on the left hand side. The problem occurs because the ] has optional space after it while the and/or operator has mandatory space before it. When parsing if 'red' == colors[1] and ..., the parser matches the space between ] and and as the optional space after ] and not as the mandatory space before and.

The solution in this PR relaxes the constraint in the and and or operators by making the space before them optional.

How to test

• Confirm that the following program works correctly in level 17:

f = ['.', '.', '.']
if f[1] == f[2] and f[2] == f[3]
    print 'test'

[mergify]

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[mergify]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).