[issue13100] sre_compile._optimize_unicode() needs a cleanup

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

There are a lot of dead or suboptimal code in the re module. For example _sre.CODESIZE now can't be 2. We could cleanup the code as side effect of optimization.

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nosy: +serhiy.storchaka

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<http://bugs.python.org/issue13100>
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