Replace some appendStringInfo* calls with more appropriate variants

Peter Eisentraut <peter_e@gmx.net>

Commit: d02f16470f117db3038dbfd87662d5f0eb5a2a9b
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2015-05-12T00:38:55Z
Releases: 9.5.0
Replace some appendStringInfo* calls with more appropriate variants

Author: David Rowley <dgrowleyml@gmail.com>

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