`apt-get update --dry-run` command does not work anymore
I just tested the behaviour of apt-get update --dry-run on a wheezy system. If I remove one of the list files from /var/lib/apt/lists apt-get update --dry-run downloads the missing file.
This suggests to me that apt-get update --dry-run does the same thing as simply apt-get update.
The --dry-run option is probably no longer valid because it was confusing people into believing that it wasn't modifying the system, when in fact evidence suggests that it was.