CHANPHA> write [<new PHA file>]
Write new PHA file. 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.
The contents of the old file, with all the changes made with CHANPHA, is
used for the new file. The current status of the changes is maintained
and more changes can be made to create another PHA file.