В /usr/lib/menu/emacs21-X11 надо изменить
title=emacs 21
на
title="emacs 21"


$ rpm -q emacs21-X11
emacs21-X11-21.3-alt7

Steps to Reproduce:
$ update-menus -n
In file "/usr/lib/menu/emacs21-X11", at (or in the definition that ends at) line 7:
[...]ons/Editors"       icon=emacs.xpm          title=emacs 21         
longtitle="Powerful editor from the GNU project"        command=emacs21-X11
[...]                                                 ^
Expected: "=".