Fix a few more generator scripts to produce pgindent-clean output.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: f859c2ffa01d83a079652ce7d953cd61eb3d7171
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2020-09-21T17:58:26Z
Releases: 14.0
Fix a few more generator scripts to produce pgindent-clean output.

This completes the project of making all our derived files be
pgindent-clean (or else explicitly excluded from indentation),
so that no surprises result when running pgindent in a built-out
development tree.

Discussion: https://postgr.es/m/79ed5348-be7a-b647-dd40-742207186a22@2ndquadrant.com

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