[issue20194] Add :deprecated: marker to formatter docs

[Brett Cannon]

Changes by Brett Cannon <brett at python.org>:


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assignee: brett.cannon
components: Documentation
nosy: brett.cannon
priority: normal
severity: normal
status: open
title: Add :deprecated: marker to formatter docs
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20194>
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