Function: vc-bzr-responsible-p
vc-bzr-responsible-p is a function alias for vc-bzr-root, defined in
vc-bzr.el.gz.
Signature
(vc-bzr-responsible-p ARG1)
Documentation
Return the directory if FILE is (potentially) controlled by bzr.
The criterion is that there is a .bzr directory in the same
or a superior directory.