> Using mapcar is a little wasteful, since it makes a list of the results
> only to throw them all away. Better to use dolist.
>
> It would be good to move point to BEG, temporarily,
> so that the functions can tell where the text came from
> in case they care.
Yes, true.
> However, the real question is whether this is the right feature
> for doing the job. Have you changed longlines.el to use it?
> Does it do what longlines needs?
Yes, I have changed longlines.el to use it, and I have confirmed that it
does what I need.
In that case, could you make those two little changes, and then
would someone please install it?
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