[issue11549] Build-out an AST optimizer, moving some functionality out of the peephole optimizer

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Bumping the target version to 3.4.

This is still a good long term idea, but it's a substantial enough change that we really want to land it early in a development cycle so we have plenty of time to hammer out any issues.

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versions: +Python 3.4 -Python 3.3

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