Amit Kapila 92c4abc736 Fix assorted inconsistencies.
There were a number of issues in the recent commits which include typos,
code and comments mismatch, leftover function declarations.  Fix them.

Reported-by: Alexander Lakhin
Author: Alexander Lakhin, Amit Kapila and Amit Langote
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/ef0c0232-0c1d-3a35-63d4-0ebd06e31387@gmail.com
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