Progress lines now use the form:
..., <subject> elapsed: <dur>, <subject> ETA: <time> (est remain <dur>).
ui.Time formats same-day times as HH:MM:SS and other-day times as
YYYY-MM-DD HH:MM:SS, with no timezone suffix (local time is implied).
The local-index-database prune complete line now shows remaining
counts for each category:
... 1 incomplete snapshots removed (3 remain), 3783 orphaned files
removed (42 remain), ...
sneak
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