Wanted: a verbosity mode that would print the actual commands being run

Should also work with `-n`.

Ideas for the flag: `-x` (a la `sh -x`), `-v -v` (downside: what if I don't want the plain-text descriptions of what it wants to do, and just want the shell commands?)

Other considerations: I often want to see what backup commands would be executed without running them.  The overwrite check hampers that.  Maybe it should be turned off in -n mode?  But maybe not?
