- assert_eq!(def.parse(&"--option".to_string(), None), Err(OptionError::ParseError));
- assert_eq!(def.parse(&"--nooption".to_string(), None), Err(OptionError::InvalidFormat));
- assert_eq!(def.parse(&"--option".to_string(), Some(&"42".to_string())),
+ assert_eq!(def.parse("--option", None), Err(OptionError::ParseError));
+ assert_eq!(def.parse("--nooption", None), Err(OptionError::InvalidFormat));
+ assert_eq!(def.parse("--option", Some(&"42".to_string())),