History of gc 4 changes

In src/cli/workspace.rs, lines 1029–1064 on 0554aaa7ddef03e68e06b8ff9dfe1a2787602e26acdff916f956250a2e142287. 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 1029,1064:src/cli/workspace.rs.