I think "stable", "experimental", and "nonfree" (as suggested by Sean) would be fine, and those names should be used upstream. But as I said in the initial report, Ubuntu shouldn't be showing the "Apply the following changes?" window at all.
I think "stable", "experimental", and "nonfree" (as suggested by Sean) would be fine, and those names should be used upstream. But as I said in the initial report, Ubuntu shouldn't be showing the "Apply the following changes?" window at all.