+echo >>debian/zorkmid '// debian'
+git add debian/zorkmid
+git commit -m 'DEBIAN add zorkmid'
+
+echo >>src.c '// upstream'
+git commit -a -m 'UPSTREAM edit src.c'
+
+for f in debian/zorkmid src.c; do
+ echo '// both!' >>$f
+ git add $f
+done
+git commit -m 'MIXED add boths'
+
+git tag t.before
+
+t-git-debrebase
+
+git diff t.before -- ':.' ':!debian/patches'