doc: Fix typos

Peter Eisentraut <peter_e@gmx.net>

Commit: 3246135c478aac417aefb122d2299433eb1ff8f8
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2016-07-15T02:28:41Z
Releases: 9.5.4
doc: Fix typos

From: Alexander Law <exclusion@gmail.com>

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