[primer] Show changed messages as diffs instead of removed+added#10914

Draft

Pierre-Sassoulas wants to merge 8 commits intopylint-dev:mainfrom

Pierre-Sassoulas:primer-message-smarter-diff

Commits on Apr 26, 2026

[primer] Detect changed messages via position-based pairing
Pierre-Sassoulas
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[primer] Classify new messages into false-positive categories
Pierre-Sassoulas
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[primer] Clarify location diff wording and robustify key iteration
Pierre-Sassoulas
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[primer] Cover classification branches and truncation edge cases
Pierre-Sassoulas
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[primer] Thread ChangedMessage through message_diff and split comment helpers
Pierre-Sassoulas
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[primer] Simplify residual pairing to single-sided bucketing
Pierre-Sassoulas
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[primer] Pair symbol-renamed messages at the same location
Pierre-Sassoulas
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[primer] Drop the ``locally-disabled`` new false positive bucket
Pierre-Sassoulas
committed