FA-75738 / Text diff and three-way merge / Member archive

Blame propagation: whitespace-only rewrites keep old blame even when not requested · case 03

Plain blame hides reformatting commits.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Given the old file's per-line commit annotations and an edit script, produce annotations for the new file: context lines keep their old annotation, added lines get the new commit. With ignore_ws, within a run of removed lines followed by added lines, the i-th added line keeps the i-th removed line's annotation when both are equal after deleting all whitespace.

Why this case matters

Blame and annotate views follow each line through history; whitespace-insensitive blame should not credit reformatting commits.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
whitespace-only change is new without the flag	`["c1", "c2"]`	`["N", "c2"]`	Failed

MEMBER ARCHIVE

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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