$var expanded to \$var not value of var (REGRESSION)

[jimav]

Completions involving $Varname are erroneously replaced by \$Varname rather than the value of the variable.
This is a regression since an earlier Ubuntu release.

For example, if a file 'typescript' exists in your home directory, then typing

   ls $HOME/type<tab>

gives you

   ls \$HOME/typescript

(the actual characters output as a result of typeing <tab> were
^H^H^H^H^H^H^H^H^H^H\$HOME/typescript ^M)

The expected result is

   ls /home/jima/typescript # for example

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: bash-completion 1:1.3-1ubuntu6
ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
Uname: Linux 3.0.0-16-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sun Feb 26 17:33:13 2012
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: bash-completion
UpgradeStatus: No upgrade log present (probably fresh install)