RE: same data appears twice, interactive then function body

[Drew Adams]

> Technologist Adams was kind enough to write me a private mail

Apologies, but that was only by accident.  As mentioned
earlier, when I use Reply All to reply to your messages
to an Emacs mailing list, the To field has only your name,
and the Cc field is blank.  I have to remember that when
replying to you I need to manually add the mailing list
to the Cc or To field.

IOW, nothing special intended.  I'm no expert in email,
and I'm not about to try reconfiguring my email client.

> telling me my function `insert-string-centered' didn't work
> when used from Lisp. Well, that's what I think anyway, since
> I received it in my mailbox with no reference in the headers
> to either gmane.emacs.help or help-gnu-emacs@gnu.org, and it
> doesn't seem to be anywhere else to be found, either!
>
> Probably, he wanted to save me from being all embarrassed in
> from of everyone. Well, that was kind! But no worries!
> Actually, and to be frank about it, this isn't the first
> mistake I ever ever made as a programmer...

See above for the (mundane) explanation.