twFileName( cFile )
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     twFileName() returns a DOS formatted file name of the form:

                XXXXXXXX.XXX
                 file    ext

     Parent and sub-directory symbols consisting of one or two dots are
     aligned along the existing period.

       Arguments:

     cFile - 'C' File name as returned from DIRECTORY().

       Return:

     Formatted file name.

       Example:

     cFName := twFileName( "try.c" ) -> "     try.c  "