Improved test by removing a buncha 'sleep 1'.

* In order to see when a file has been modified by Fix.sh on a
  filesystem with one second resolution (Hi Mac OS X!) the previous test
  waited one second before running Fix.sh. Instead of doing this the
  tests now touch the files to move their mtime one second back in time.
Changed order of dashtap 'write_file' arguments.

* 'write_file' arguments are now in a more 'natural' order, i.e. chmod
  bits and date stamp come before the filename (to better mimic the
  argument order used by both chmod and touch commands).