Description of test bidi-markup-028

The description of the test bidi-markup-028 says:

> The bdo element with dir set to rtl causes all contained text to 
> ignore the bidirectional algorithm and displays all characters from 
> right to left

I think that "ignore the bidirectional algorithm" is a bit strong. Bidi 
controls in a BDO are still interpreted, right?

How about "The bdo element with dir set to rtl causes the contained text 
to be treated as if wrap by U+202E/U+202C, and this particular test, to 
display all characters from right to left."

Similarly for bidi-markup-027.

Eric.