message: make test clearer
diff: @@ -499,7 +499,6 @@ fn use_workspace_root_lockfile() {
  // Workspace members should use `Cargo.lock` at workspace root
  Package::new("serde", "0.2.0").publish();
  - Package::new("serde", "0.2.1").publish();
  let p = project()
  .file(
  @@ -538,12 +537,13 @@ fn use_workspace_root_lockfile() {
  .file("bar/src/main.rs", "fn main() {}")
  .build();
  - // Create `Cargo.lock` in the workspace root, and set it to use
  - // `serde v0.2.0`
  + // Create `Cargo.lock` in the workspace root.
  p.cargo("generate-lockfile").run();
  - p.cargo("update -p serde:0.2.1 --precise 0.2.0").run();
  - // Expect: package `bar` uses `serde v0.2.0` as required by workspace lock
  + // Now, add a newer version of `serde`.
  + Package::new("serde", "0.2.1").publish();
  +
  + // Expect: package `bar` uses `serde v0.2.0` as required by workspace `Cargo.lock`.
  p.cargo("package --workspace")
  .with_stderr(
  "\
  