doc: make ref/*.sgml file header comment layout consistent

Bruce Momjian <bruce@momjian.us>

Commit: ca5381dae7235ff73e3f6347af004ac9c901e5d2
Author: Bruce Momjian <bruce@momjian.us>
Date: 2020-05-15T12:52:24Z
Releases: 9.5.23
doc:  make ref/*.sgml file header comment layout consistent

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