Make python2 koans pep8-compliant.
Running the pep8 script still throws up a number of errors: mostly W293
(whitespace on blank line), E701 (multiple statements on one line
(colon)), and E501 (line too long).
W293 I ignore to make copy-pasting into the interpreter easier: a blank
line between two class methods would make the interpreter think the
class was done.
Where E701 survives, it's mostly in statements like ``if i > 10: break``.
E501, lastly, matches a particular pet peeve of mine, and I have chopped
up the lines in question wherever possible. The long-named method
definitions were hardest: I renamed those to something shorter where I
could think of somthing, but a number remain.