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	["756" "Mon" "29" "June" "1998" "17:00:17" "+1000" "Richard Walker" "Richard.Walker@CS.ANU.EDU.AU" nil "16" "Re: Modules" "^Date:" nil nil "6" nil "Modules" nil nil nil]
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From: Richard Walker <Richard.Walker@CS.ANU.EDU.AU>
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Subject:      Re: Modules
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Hans Aberg writes:
 > >(or according to Hans - I need more convincing):
 > >
 > >  \hierarchical/path/to/module/perhaps_with
 > >      _underscores/macro_name:argspec:
 >
 >   The only point with a terminating ":" would be to make it easier
 > to know where the argspec ends if one processes the command
 > name. This could be done otherwise by a convention that the argspec
 > can only occupy one letter, or if that does not give sufficiently
 > many combinations, that if the first letter is uppercase it is a
 > two letter argspec, or something.

Hmm . . . at this stage let's say that an argspec can only contain
A-Z and a-z.  Then the argspec is the longest contiguous sequence of
letters after the colon - easily specified with a regular expression.