We believe that your issue has been closed by the upload of
Version  of  from Alexander Wirt <formorer@grml.org> .
The explanation is attached below

0.3.10 of grml-etc-core successfully installed in grml-testing.
Changed-By: Alexander Wirt <formorer@grml.org> 
Changes:
 grml-etc-core (0.3.10) unstable; urgency=low
 . 
   * /etc/zsh/zshrc: use \e instead of the escape-sequence.
     Thanks for the patches, ft! [Closes: issue229, issue230]
Files:
 5c873438dcb5fe83367df7e058fdccd5 507 grml optional grml-etc-core_0.3.10.dsc
 34404e910b662160121c97b25d0b0848 82112 grml optional grml-etc-core_0.3.10.tar.gz
 3d0ae6e9126f1d9ffbf93e5447d64829 84742 grml optional grml-etc-core_0.3.10_all.deb