operating on too many command-line-specified nonempty directories.
ptx now diagnoses invalid values for its --width=N (-w)
and --gap-size=N (-g) options.
+ rm (and mv when moving between partitions) no longer fails when
+ operating on too many command-line-specified nonempty directories.
+
rm (without -f) no longer hangs when attempting to remove a symlink
to a file on an off-line NFS-mounted partition.