Bug#41651: apt: update script unhappy with ash as sh

[<dres@ioa.com>]

Package: apt
Version: 0.3.11
Severity: wishlist

This is in reference to the /var/lib/dgpk/methods/apt/update script.
output is

/usr/lib/dpkg//methods/apt/update: 21: Syntax error: "(" unexpected (expecting "fi")

update available list script returned error exit status 2.
Press RETURN to continue.

when sh is linked to ash rather than bash.  Changing the #!/bin/sh line to #!/bin/bash 
makes the error go away.

Dres

-- System Information
Debian Release: potato
Kernel Version: Linux dres 2.2.9-ac6 #1 Wed Jul 7 21:39:30 EDT 1999 i686 unknown

Versions of the packages apt depends on:
ii  libc6           2.1.1-13       GNU C Library: Shared libraries and timezone
ii  libstdc++2.9-gl 2.91.66-2      The GNU stdc++ library (EGCS version)