bug#19129: 25.0.50; recenter-positions is missing a reference to move-to-window-line-top-bottom

[Drew Adams]

> > What you did, it sounds like (to me), is fix an additional bug: a
> > doc-string line that was too long.
> 
> No line of the original doc string was too long.  Please re-read the
> patch.

I said "it sounds like".  Based on the description I was replying
to, it sounded like text was filled because some line was up to 80
columns wide.