hack attempt to deal with file names containing whitespace.
here we only list changed files.

The new -F flag enables 'fixed field number mode' which
means that we assume that all file info lines contain the
same number of fields, and we restrict the nr of fields
to the first nr (> 2) that we encounter.

The new   -f nfields   flag assumes that all file info lines
contain nfield fields.

the -F is just a heuristic, but it might just work :-)
dunno if it is worth a patch.