S16 replaced backward pagination's estimate-render-compare-adjust loop
with anchor replay, but left _estimate_page_start and
_adjust_start_estimate behind. Nothing in the library calls them; only
their own tests did.
_estimate_page_start guessed max(1, int(10 / font_scale)) blocks per
page - a constant with no relationship to page size, block length or
font metrics - and _adjust_start_estimate halved the error each round to
converge on it. Anchor replay makes both meaningless: it walks forward
from a known page boundary instead of guessing at one.
Removes their five tests with them rather than leaving tests pinning
behaviour nothing depends on.
889 passed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
dtourolleandClaude Opus 5
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