For reference, apt-file 3 will now prefer the "$SUITE/$COMPONENT/Contents-$ARCH" location over "$SUITE/Contents-$ARCH". If launchpad provides both locations, it should work for apt-file 2 (in older releases) and apt-file 3 (artful and later). At the same time, it would also fix LP: #1697120 (currently filed against apt-file 3).
For reference, apt-file 3 will now prefer the "$SUITE/ $COMPONENT/ Contents- $ARCH" location over "$SUITE/ Contents- $ARCH". If launchpad provides both locations, it should work for apt-file 2 (in older releases) and apt-file 3 (artful and later). At the same time, it would also fix LP: #1697120 (currently filed against apt-file 3).