Problem with tei:line when serializing B3
Extracted from f842e8e0 (comment 144194).
For some reason else if($node/following::*[1][self::tei:lb[@break = "no"]] ...)
returns true()
for tei:line
on surface 57r which results in missing elements. The fix proposed in !66 (merged) solves this, but the reason for this unexpected behaviour is still unclear.