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tag: v4.0.0.beta1
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if RUBY_VERSION < '1.9.3'
desc = defined?(RUBY_DESCRIPTION) ? RUBY_DESCRIPTION : "ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE})"
abort <<-end_message
Rails 4 prefers to run on Ruby 2.0.
You're running
#{desc}
Please upgrade to Ruby 1.9.3 or newer to continue.
end_message
end
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