= RubySpec

RubySpec (http://rubyspec.org) provides the Ruby langauge specification in an
executable format. The make task `update-rubyspec' retrieves the specification
and put it into this directory.

 spec
  +-- mspec            driver library for executing the specification.
  +-- rubyspec
       +-- 1.8
       |    +-- core
       |    +-- ...
       |
       +-- 1.9
            +-- core        specification for core libraries 
            |    +-- array 
            |    +-- bignum
            |    +-- ...
            |
            +-- fixtures    
            +-- language    specification for Ruby language itself
            +-- library     specification for standard libraries.
                 +-- addrev
                 +-- ...

= How to run
:make target
  verifies all specs.
   $ make test-rubyspec
:mspec command
  verifies the specified spec.
   $ mspec spec/path/to/some_spec.rb
