From: Michel Demazure <michel@...>
Date: 2007-07-03T02:59:42+09:00
Subject: getting rid of $0

The common idiom
 if __FILE__ == $0 then ...
gives bugs when $0 is not what one would expect, for instance under a
debugger, or in rubyscript2exe, etc.

There should be a primitive test
   if <nice name to be found> then...

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