message: Drop after_help in generate-lockfile
  From reviewing the history this looks like a copy-paste error while
  porting to clap (https://github.com/rust-lang/cargo/pull/5152): this is
  fetch's after_help info
diff: @@ -6,18 +6,6 @@ pub fn cli() -> App {
  subcommand("generate-lockfile")
  .about("Generate the lockfile for a project")
  .arg_manifest_path()
  - .after_help(
  - "\
  -If a lockfile is available, this command will ensure that all of the git
  -dependencies and/or registries dependencies are downloaded and locally
  -available. The network is never touched after a `cargo fetch` unless
  -the lockfile changes.
  -
  -If the lockfile is not available, then this is the equivalent of
  -`cargo generate-lockfile`. A lockfile is generated and dependencies are also
  -all updated.
  -",
  - )
  }
  pub fn exec(config: &mut Config, args: &ArgMatches) -> CliResult {
  