[issue28308] Accelerate 'string'.format(value, ...) by using formatted string literals

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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dependencies: +Build-out an AST optimizer, moving some functionality out of the peephole optimizer

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28308>
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