If you haven’t touched any setting about “Separated Sources”, you can just ignore this update.
In the last Ubuntu Tweak 0.5.8, I made a mistake. If you disabled the “Use Separated Sources” in the preferences in Ubuntu Tweak, all your Launchpad PPA sources may be “lost”(In fact, they’ve been moved to the separated file).
Because Ubuntu Tweak 0.5.8 has a feature which will convert the PPA source files to standard name, E.G. ubuntu-tweak-testing-source.list will be converted to ubuntu-tweak-testing-ppa-maverick.list.
I forgot to check the “Separated Sources” setting so that the PPA source in /etc/apt/sources.list will be converted too.
The bug report has been created: https://bugs.launchpad.net/ubuntu-tweak/+bug/694741
Now I’ve fixed this bug in Ubuntu Tweak 0.5.9 and provided a script to merge these PPA sources back to your sources.list.
Then open your terminal, run this command:
Now your sources.list with be OK!
Sorry for the mistake! I will be more careful in the future.
BTW: I’ve updated the translations for Bengali, Finnish, French and Spanish. Thank all the translators!