Kernel.abort implementation differs from MatzRuby
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                 Key: JRUBY-4461
                 URL: http://jira.codehaus.org/browse/JRUBY-4461
             Project: JRuby
          Issue Type: Bug
          Components: Core Classes/Modules
    Affects Versions: JRuby 1.4
            Reporter: Ben Butler-Cole


MatzRuby implements Kernel.abort by raising a SystemExit exception. This is 
handled at the top level by printing the message and then exiting.

JRuby prints the message immediately and then raises a MainExitException.

This makes testing the abort behaviour of scripts difficult because
1) you have to require Java and catch a different exception
2) you can't test the message produced easily.

I have added the missing specs to RubySpec 
(http://github.com/benbc/rubyspec/commit/0f78fb955328a9de2f680ab42436ed7e2392e67a).


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