message: apply clippy suggestions
diff: @@ -220,7 +220,7 @@ fn transmit(config: &Config,
  Ok(())
  },
  - Err(e) => Err(e.into()),
  + Err(e) => Err(e),
  }
  }
  @@ -437,7 +437,7 @@ pub fn modify_owners(config: &Config, opts: &OwnersOptions) -> CargoResult<()> {
  (Some(name), Some(email)) => println!(" ({} <{}>)", name, email),
  (Some(s), None) |
  (None, Some(s)) => println!(" ({})", s),
  - (None, None) => println!(""),
  + (None, None) => println!(),
  }
  }
  }
  