Changes touching this path

• the implicit capture in front of every bare mutating verb reads the working tree once, so the tree it judges clean is the tree it records, and the doors already committed to capturing ask their refusals before paying for a read (#1395) 7f1fb453 · dbf3dbe6…

Renames are not followed. loot's tree maps a path to an address, so a rename is a delete and an add. This list is the history of the name, not of the bytes.