Post Revisions: Upgrade `diff` from v4 to v8#77992

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manzoorwanijk wants to merge 3 commits intotrunkfrom

upgrade/diff-to-v8

Commits on May 6, 2026

Post Revisions: Upgrade `diff` from v4 to v8
manzoorwanijk
committed
Post Revisions: Drop vendored `diffArrays`, filter whitespace blocks
manzoorwanijk
committed
Post Revisions: Migrate remaining `diff` imports, add CHANGELOG entries
manzoorwanijk
committed