fix: treat unchanged symlinks as identical in diff - #1829
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Summary
Treats unchanged symlinks as identical during
diff, while keeping the existing target comparison intact.Why
Symlink targets were compared correctly, but the final node comparison treated symlinks as non-comparable and reported unchanged links as modified. The comparison now accepts the already-checked target result.
Validation
cargo test --locked --test backup_restore diff_reports_unchanged_symlinks_as_identicalgit diff --checkFixes #1776.