- C-6: the content-5-gram check used 'gram in src' on space-joined strings, so the
first/last gram token could match a prefix/suffix of a longer chunk word
('set' inside 'subset'). Both gram and chunk are now space-padded, so a match
requires whole-token alignment. Regression test added.
- R-2: the reference-list filter's author pattern ('Surname, I.') also matched
'Theorem A.'/'Lemma B.', so theorem-dense chunks could be dropped as a
bibliography. The pattern now excludes common math-structure words.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>