BDI: neutral when number

Test passes if the two boxes are identical.

א - [1]...
א - [1]...
א - [1]...
a - [1]...
a - [1]...
a - [1]...
‭א - [1]...‬
‭א - [1]...‬
‭א - [1]...‬
‭...[1] - a‬
‭...[1] - a‬
‭...[1] - a‬

'For the purposes of applying the bidirectional algorithm to the paragraph-level container that a bdi element finds itself within, the bdi element must be treated like a U+FFFC OBJECT REPLACEMENT CHARACTER.'

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HTML5

the-dir-attribute-085
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Assumptions: