Convert specs to RSpec 2.99.1 syntax with Transpec

This conversion is done by Transpec 2.2.2 with the following command:
    transpec

* 255 conversions
    from: obj.should
      to: expect(obj).to

* 114 conversions
    from: == expected
      to: eq(expected)

* 40 conversions
    from: it { should_not ... }
      to: it { is_expected.not_to ... }

* 40 conversions
    from: obj.should_not
      to: expect(obj).not_to

* 24 conversions
    from: be_true
      to: be_truthy

* 6 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 3 conversions
    from: =~ /pattern/
      to: match(/pattern/)

* 3 conversions
    from: be_false
      to: be_falsey

* 2 conversions
    from: collection.should have(n).items
      to: expect(collection.size).to eq(n)

* 1 conversion
    from: >= expected
      to: be >= expected

* 1 conversion
    from: collection.should have_exactly(n).items
      to: expect(collection.size).to eq(n)

* 1 conversion
    from: lambda { }.should_not
      to: expect { }.not_to

For more details: https://github.com/yujinakayama/transpec#supported-conversions
fix test case
update feature steps to use new rspec syntax
update group node formatting options

do not push formatting options to child nodes; this is a feature
that is in the spec but will be removed in future versions.