doc: Markup and formatting improvements

Peter Eisentraut <peter_e@gmx.net>

Commit: a2760915b3a88f8e1b447dd5343549a1ebbb0f78
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2017-03-22T19:27:40Z
Releases: 10.0
doc: Markup and formatting improvements

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