pgsql: Fix a few more generator scripts to produce pgindent-clean outpu

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

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/f859c2ffa01d83a079652ce7d953cd61eb3d7171

Modified Files
--------------
src/backend/utils/sort/gen_qsort_tuple.pl | 7 ++++---
src/pl/plpgsql/src/generate-plerrcodes.pl | 2 +-
src/pl/plpython/generate-spiexceptions.pl | 4 ++--
src/pl/tcl/generate-pltclerrcodes.pl      | 2 +-
4 files changed, 8 insertions(+), 7 deletions(-)