View show spec from rails g scaffold fails

I did a `rails g scaffold <Model> <field>:<type>` and ran `rake`. It produced the following failure:

    <model>/show renders attributes in <p>
         Failure/Error: rendered.should match(/MyText/)
         NoMethodError:
           undefined method `should' for #<String:0x007f889e577ed8>

Rspec is configured to use the expect syntax, so I updated

    rendered.should match(/MyText/)

to

    expect(rendered).to match(/MyText/)

Also, the description is wrong... scaffold generates a `<dl><dt></dt><dd></dd></dl>`, not a `<p>`.