Audit mv(1)

1) Make argument-naming consistent with other tools (cp(1), ...)
2) style fixes
3) usage() fix
4) BUGFIX: Probably from the old non-arg.h days, the directory-
   check was only done when argc > 3, but with arg.h, this ignores
   the case when 3 arguments were given.
   This is actually a pretty serious issue and I'm glad it's fixed.
5) Moreover, be more verbose when stat() fails and make it clearer
   what the hell is going on at this checkpoint.

mv.1

@@ -1,4 +1,4 @@
-.Dd February 19, 2015
+.Dd March 4, 2015
 .Dt MV 1
 .Os sbase
 .Sh NAME
@@ -8,17 +8,17 @@
 .Nm
 .Op Fl f
 .Ar source ...
-.Ar destination
+.Ar dest
 .Sh DESCRIPTION
 .Nm
 moves each
 .Ar source
 to
-.Ar destination .
+.Ar dest .
 If only one
 .Ar source
 is given and
-.Ar destination
+.Ar dest
 is not a directory,
 .Nm
 overwrites the latter with the former.
@@ -26,7 +26,7 @@ overwrites the latter with the former.
 .Bl -tag -width Ds
 .It Fl f
 Do not prompt before overwriting.
-.Ar destination .
+.Ar dest .
 Prompting has not been implemented yet.
 .El
 .Sh STANDARDS