bug#23279: display mucks up

[Alexis]

Rob Dunne <rob.dunne@gmail.com> writes:

> emacs -Q load a file 
> -------------------------------------------------------------------------------- 
> \documentclass[11pt]{article}
>
> #type C-k on this line, twice
>
> \begin{document} \end{document} stuff 
> --------------------------------------------------------------------------------
>
> type C-k on the line indicated, twice. The file now looks like 
> -------------------------------------------------------------------------------- 
> \documentclass[11pt]{article}
>
>
> stuff stuff stuff 
> -------------------------------------------------------------------------------- 

i'm unable to reproduce this on my Debian Jessie x86_64 system, 
having tried 24.3, 24.5, a recent emacs-25 branch build, and a 
recent master branch build.

Does your version of Emacs come from an Ubuntu package, or did you 
manually compile it yourself?