History of gc 4 changes

In src/cli/workspace.rs, lines 1017–1052 on 69816d68830059c6155cbc8b14376c47c805a3d978e49de8daf28c648424a823. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 1017,1052:src/cli/workspace.rs.