CHANPHA> exit [<new PHA file>]
exit writes a new PHA file and exits the program. If no <new PHA
file> name is given, then the file name given on the command line (when CHANPHA
was started) is used. If no file name for the new PHA file is specified
at the command line either, a new version of the old PHA file is created.
For the new file, the contents of the old file with all the changes made
with CHANPHA is used.