Bug#578734: default/grub: Use POSIX command substitution

[Colin Watson]

On Thu, Apr 22, 2010 at 01:10:03PM +0300, Jari Aalto wrote:
> POSIX command substitution
> 
> The following patch updates to use POSIX[1] command substitution $() in
> place of backtics (``).

It's only worth making this change if we're changing something else
nearby in the file anyway; otherwise many users will get a dpkg conffile
prompt for a fairly abstract benefit.

Thanks,

-- 
Colin Watson                                       [cjwatson at debian.org]