[issue3113] Document exception chaining

[Benjamin Peterson]

New submission from Benjamin Peterson <musiccomposition at gmail.com>:

PEP 3134's features need to be documented.

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assignee: georg.brandl
components: Documentation
messages: 68215
nosy: benjamin.peterson, georg.brandl
priority: high
severity: normal
status: open
title: Document exception chaining
versions: Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3113>
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