The previous parser treated any non-empty non-header line as a bullet,
so 'plain paragraph' answers were silently rewrapped as <ul><li>. Now
we only count a line if it had a recognized bullet marker (- * • ·);
if none did, fall back to raw + <pre> as originally intended.
Tests cover dash/asterisk/unicode bullets, blank-line tolerance,
Summary:/TL;DR header stripping, HTML escaping, single-bullet output,
the no-marker passthrough path, and the IsQuestionReaction set.
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