bzr diff -rtag:0.7.4-12ubuntu1.. --prefix=a52dec-0.7.4-12ubuntu1/:a52dec-0.7.4-13ubuntu1/> a52dec-0.7.4-12ubuntu1.debdiff
bzr diff -rtag:0. 7.4-12ubuntu1. . --prefix= a52dec- 0.7.4-12ubuntu1 /:a52dec- 0.7.4-13ubuntu1 /> a52dec- 0.7.4-12ubuntu1 .debdiff