To update an already-existing dev-release patch, do this:

    PREV=2.068_03
    NEW=2.068_04
    quilt push 0001-update-to-upstream-dev-release-$PREV.patch
    quilt add $(cd ../pdl-code/; git diff --name-only $PREV..$NEW)
    (cd ../pdl-code/; git diff $PREV..$NEW)|patch -p1
    quilt refresh
    quilt pop -a
    dch --team 'Update dev-release patch to latest dev-release'
    debcommit -a # now rename patch, edit description, update patches/series
    time (perlbrew off; gbp buildpackage --git-pbuilder --git-dist=sid)
