message: Tweak the error message when updating an empty registry while offline.
diff: @@ -178,7 +178,8 @@ Caused by:
  Caused by:
  unable to fetch registry `https://github.com/rust-lang/crates.io-index` in offline mode
  -Run `cargo fetch` to download the registry index and all of a project's dependencies before going offline.
  +Try running without the offline flag, or try running `cargo fetch` within your \
  +project directory before going offline.
  ",
  )
  .run();
  