message: Fixup cargo install's help message
diff: @@ -51,7 +51,7 @@ repository with multiple crates) the `<crate>` argument is required to indicate
  which crate should be installed.
  Crates from crates.io can optionally specify the version they wish to install
  -via the `--vers` flags, and similarly packages from git repositories can
  +via the `--version` flags, and similarly packages from git repositories can
  optionally specify the branch, tag, or revision that should be installed. If a
  crate has multiple binaries, the `--bin` argument can selectively install only
  one of them, and if you'd rather install examples the `--example` argument can
  