[SLUG] Adding text to a postscript file

[Erik de Castro Lopo <mle+slug@xxxxxxxxxxxxx>]

Hi all,

I have a small postscript file which is a template for a ticket.
I now need to find a way to add custom text to this file before
printing and I need to be able to do this from the command line.

Anybody have any suggestions or pointers?

Cheers,
Erik
-- 
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Erik de Castro Lopo
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Gambling(n): A discretionary tax on those asleep during high school
maths.