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Changed error messages as per:

Sun Apr  6 12:38:21 PDT 2008  Tim Chevalier <chevalier@alum.wellesley.edu>
  * Improve error message for non-matching file name
 

Changed error message as per:

Sun Apr  6 13:23:33 PDT 2008  Tim Chevalier <chevalier@alum.wellesley.edu>
  * Improve error message for malformed LANGUAGE pragma
  

Check that :list keeps working after setCurrentDirectory has been used

This might as well be the default output, so we at least have a chance
of this test working on other platforms.