Manual pages completion

Hello,
recently I added a few missing (they were in --help messages, but not in
man pages) options to man pages of ecpg (missing -h option) and initdb
(the -s/--show options). However, I was doing the repairs on generated
man pages in fedora package, and when I cloned the original git repo of
PostgreSQL, I found out that they are somehow generated, and I should
have edited the original source.

My problem is, I cannot find the source. I found some SGML files, but
they are very descriptive and they doesn't look like what I'm searching for.

Can anybody point me to which files should I edit in order to fill in
the missing options?

Thanks in advance and best regards,
Jan Stanek

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Jan Stanek - Red Hat INTERN Developer Engineer - Databases Team