Fix minor bug in the error message for a non-existent directory.
Fix minor bug in the error message for a non-existent directory.

rename-file does not take a :if-exists argument (only OpenMCL's does).

(with-open-file (f ..)) may or may not use f.  So declare f ignorable
instead of ignore'd.



skypher/montezuma,sharplispers/montezuma,sharplispers/montezuma,skypher/montezuma,skypher/montezuma,sharplispers/montezuma