t) they should both
         be entirely within the (padded) width of the NBSP, if they are properly
         positioned (regardless of their order). -->
    <div class=test>a<span dir=rtl>&nbsp;&#x654;&#x670;</span>z</div>
    <div class=test>a<span dir=rtl>&nbsp;&#x670;&#x654;</span>z</div>
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