we rely on --rm-old-changes, or failing that, fail early.
* When doing quilt linearisation, treat upstream .gitignores not
in the toplevel the same way we treat ones in the toplevel.
we rely on --rm-old-changes, or failing that, fail early.
* When doing quilt linearisation, treat upstream .gitignores not
in the toplevel the same way we treat ones in the toplevel.