bug#18405: bug#28311: 25.2; Improve syntax highlighting in bat-mode

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: Achim Gratz <Stromeko@nexgo.de>,  Anders Lindgren <andlind@gmail.com>,  
> 28311@debbugs.gnu.org,  18405@debbugs.gnu.org
> Date: Fri, 22 Sep 2017 13:01:03 -0400
> 
> 
> Running 5 tests (2017-09-22 09:57:54-0700)
>    passed  1/5  bat-test-fill-paragraph-comment
> hfy batch mode ( *temp*-973592:bat-mode)
> Test bat-test-fontification-iter-var-1 backtrace:

Thanks, fixed.