doc: Clarify some wording in PL/pgSQL about transactions

Peter Eisentraut <peter_e@gmx.net>

Commit: 17df2a8b3946895c78f4ca088804341172ef27ae
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2018-08-22T13:43:07Z
Releases: 11.0
doc: Clarify some wording in PL/pgSQL about transactions

Some text was still claiming that committing transactions was not
possible in PL/pgSQL.

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doc/src/sgml/plpgsql.sgml modified +3 −4

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