$ becomes \$ upon tab expansion

[積丹尼 Dan Jacobson]

$ ls $HOME/xx/yy/z<TAB>
becomes
$ ls \$HOME/xx/yy/zz

It should become
$ ls $HOME/xx/yy/zz
else it will fail when the user finally hits RET.

(Assume a zz file already exists. "ls" here is just an example. same for
"cat" etc.) Bash 5.0.16