guestfish -i "/some/path with a space" does not work correctly.
*** Bug 532493 has been marked as a duplicate of this bug. ***
Patch posted upstream: https://www.redhat.com/archives/libguestfs/2010-May/msg00057.html
Fixed because now we use the core inspection code which means that we don't have to pass a string between instances of guestfish and virt-inspector.