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Michael Albinus authored
* vc/vc-hooks.el (vc-state, vc-working-revision): Use `vc-responsible-backend' in order to support unregistered files. * vc/vc-rcs.el (vc-rcs-fetch-master-state): * vc/vc-sccs.el (vc-sccs-working-revision): Handle undefined master name. * vc/vc-rcs.el (vc-rcs-unregister): Support unregistered files. * vc/vc-src.el (vc-src-working-revision): Do not return an empty string.
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