ignore ruby 2.2.0 + rails 3.2.x combination
ignore ruby 2.2.0 + rails 3.2.x combination

has errors like:
  ..ruby-2.2.0/gems/activesupport-3.2.21/lib/active_support/dependencies.rb:251:in
    `require': cannot load such file -- test/unit/testcase (LoadError)

also, rails 3.2.x doesnot use minitest by default. hence problems.

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