Comment 1 for bug 1075260

Trevor Adams <email address hidden> wrote:
> 3) Command run: aptitude -o 'Dpkg::Options::="--force-confdef"' update

Nested quotes are invalid here. They are shell syntax and not
interpretted by APT.

The syntax for this option is in apt.conf(5). Multiple options should
be passed using multiple "-o" arguments, for example:
# apt-get update \
    -o "DPkg::options::=--force-confdef" \
    -o "DPkg::options::=--path-exclude=/usr/share/doc/*"

 status invalid