no rb, multiple bases in one ruby
Test passes if the rt content is positioned over the base text with the same number.
Assertion: When multiple ruby bases appear within a single ruby element, without the rb tag, the ruby text appears above the appropriate base text at approximately half the font size.
The Ruby Annotation spec recommends non-normatively that, in the absence of other style information, simple ruby markup should place the ruby text before (ie. above in this case) the base text. This is also the initial value for the CSS3 Ruby Module draft.
= means you should check that the test and reference graphic look the same, except for font differences.