[issue26526] In parsermodule.c, replace over 2KLOC of hand-crafted validation code, with a DFA

[Fred L. Drake, Jr.]

Fred L. Drake, Jr. added the comment:

I've read through this, but haven't applied the patch & run tests (that's what buildbots are for).

No objections.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26526>
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