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This will produce a main() procedure that emits a shell script
that will parse the command line options.  That script can be emitted
to stdout or inserted or substituted into a pre-existing shell
script file.  Improbable markers are used to identify previously inserted
parsing text:
| # # # # # # # # # # -- do not modify this marker -- | 
The program is also pretty insistent upon starting its parsing script on the second line.