Bug with lists of pairs of lists and append()

[Gabriel Zachmann]

>     x = (list(l), list(r))

BTW: I prefer this syntax, because it makes the copy explicit, while 
l[:] seems to me more "implicit" ...

Best regards,
Gabriel.

-- 
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Life is so constructed that the event does not, cannot,
will not match the expectation.             (Charlotte Bronte)
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  zach in.tu-clausthal.de      __@/'    www.gabrielzachmann.org
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