Test passes if the two boxes below look exactly the same.
Key to entities used below:
א ... ו - The first six Hebrew letters (strongly RTL).
 - The LRO (left-to-right override) formatting character.
 - The PDF (pop directional formatting) formatting character; closes LRO.
If the BDIs in the test's first DIV were SPANs, the ב would be rendered to the left
of the א.