How to make apt-get upgrade interactive?

[Richard Cobbe]

Hello, all.

While I generally trust apt-get upgrade, I'd like to have it print out a
list of the packages to be upgraded and possibly check with me before it
actually does anything.  I'm a little unsure how to do this, though.  Based
on the manpage, I added 

    APT::Get::Show-Upgraded "true";

to /etc/apt/apt.conf, but this didn't seem to have any effect.

What's happening here?

ii  apt            0.3.19         Advanced front-end for dpkg

Thanks,

Richard