[issue8478] tokenize.untokenize first token missing failure case

[Roundup Robot]

Roundup Robot added the comment:

New changeset c896d292080a by Terry Jan Reedy in branch '2.7':
Untokenize: An logically incorrect assert tested user input validity.
http://hg.python.org/cpython/rev/c896d292080a

New changeset 51e5a89afb3b by Terry Jan Reedy in branch '3.3':
Untokenize: An logically incorrect assert tested user input validity.
http://hg.python.org/cpython/rev/51e5a89afb3b

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nosy: +python-dev

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