History of gc 4 changes

In src/cli/workspace.rs, lines 1029–1064 on da868d5d26460cafe17d145651b213897fefb09becde1792a3df4d8aedc426c4. 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.