Robert Muir 9302eee1e0
LUCENE-9235: upgrade all python to python3
Die, python2, die.

Some generated .java files change (parameterized automata for
spell-correction).

This is because the order of python dictionaries was not well-defined
previously. A sort() was added so that the python code now generates
reproducible output (Thanks @mikemccand).

So we'll suffer a change once, but the automata are equivalent. If you
run the script again you should not see source code changes.

The relevant unit tests are exhaustive (if you trust the paper!), so we can
be confident it does not break things, even though it looks very scary.
2020-02-20 21:27:38 -05:00
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