[docs] [issue27910] Doc/library/traceback.rst — references to tuples should be replaced with new FrameSummary object

[SilentGhost]

Changes by SilentGhost <ghost.adh at runbox.com>:


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stage:  -> patch review
type:  -> behavior

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27910>
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