* test(#2853): add failing-first regression for plan-progress annotation preservation
The count-bump regex's trailing [^\n]+ swallowed the whole Plans line and
the replacement wrote back only the regenerated count, deleting any
hand-written annotation after it. 8-row matrix covers bold/plain forms,
bare template form, executed path, CRLF, and idempotency.
* fix(#2853): preserve hand-written annotations in roadmap plan-progress bump
The count-bump regex's trailing [^\n]+ swallowed the entire Plans line and
the replacement wrote back only the regenerated count, deleting any
hand-written prose after the count (e.g. a gap-closure annotation).
The verb owns the count token only. Capture the existing count token ($2)
and the trailing line text ($3), and rebuild the line as
<label><new count><surviving text>. Trailing text is preserved ONLY when a
real count token preceded it, so the fresh-template bracketed placeholder
(`[Number of plans…]`) is still replaced cleanly rather than glued after
the count (pre-#2853 behaviour on the template path preserved). CRLF \r is
preserved via [^\r\n].
Widens replaceInCurrentMilestone to accept a replacement callback (needed to
branch on whether the count group matched). The bare Plans: checklist header
is still skipped — the lazy match lands on the summary line first and a
count-less bare header yields no count to anchor preservation to.
* changeset(#2853): backfill PR number 2916
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Co-authored-by: Test <test@example.com>
Co-authored-by: sim <sim@local>
