From: Brian Candler <b.candler@...>
Date: 2009-05-24T18:21:18+09:00
Subject: Re: OptionParser: unexpected behaviour with -help

Look at the source - /usr/lib/ruby/1.8/optparse.rb or somewhere similar 
on your system.

                # if no short options match, try completion with long
                # options.
                sw, = complete(:long, opt)

So it looks that if you stub out 'complete' you can get the behaviour 
you require: that is, I think you want -h to be treated as an error 
instead of as a shortcut for --headers, and ditto -e as an error instead 
of a shortcut for --ex

Alternatively, if only '-help' is a problem, you could just handle this 
special case:

ARGV.each { |a| a.replace('--help') if a == '-help' }
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