My B witness (pṛṣṭhamātra but undated) reads

That's yasya with a line-filling character that looks like a daṇḍa.  But it isn't a daṇḍa.  The nearest thing I can call it is a scribe's hyphen.   The line below, pra- is the same.  The full word is pra-bhākaraḥ.  It wouldn't be right to transcribe as daṇḍa.  But more to the point, I want to record that this Devanāgarī "hyphen" suggests that the reading yasyā in witness U is a crux showing U to be an apograph of B.  I've inserted an explanatory <note> into the transcription of B at this point:

 

yasya|<note anchored="true" type="comment on reading">This end-of-line daṇḍa may show that the yasyā reading in U proves U to be an apograph.</note><lb/>

But there must be a better way of expressing all this. Any ideas?

Best,

Dominik