[issue19513] Use PyUnicodeWriter instead of PyAccu in repr(tuple) and repr(list)

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at gmail.com>:


Added file: http://bugs.python.org/file32693/bench_tuple_repr.py

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19513>
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