[Bug 2502] "apt-file update" downloads the whole Contents file every time

[dooglus via Malone]

Public bug report changed:
https://launchpad.net/malone/bugs/2502

Comment:
My only remaining complaints would be with the line that says "# If you prefere
wget uncomment following", namely:

1)  that's not how you spell "prefer".

2)  the lines it refers to are now uncommented already, so the instruction to
uncomment them is less than clear.

The file I attached above fixes both these problems.