bug#19341: Change Log mode filling of multi-line file lists

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: 19341@debbugs.gnu.org
> Date: Thu, 11 Dec 2014 11:56:08 -0500
> 
> Eli Zaretskii wrote:
> 
> > How do you expect Emacs to distinguish between a list of files and
> > arbitrary text, in your scenario?  You only want it to do that
> > for files, right?
> 
> Files are what come after "TAB * ". Font-lock manages to figure it out.

Your example was this:

   * file1, file2, file3, file4, file5, file6, file7, file8, file9:
   * file10, file11:

In this example, file1 and file10 follow "TAB * ", but all the rest do
not.