Opinionated UA formats

[AxelTheGerman]

Great gem, one thing I had to do immediately was to build my own display format.

user_agent = UserAgentParser.parse 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0;)'
=> #<UserAgentParser::UserAgent IE 9.0 (Windows Vista)>
user_agent.to_s
=> "IE 9.0"

As per above (from the docs) to_s is too brief for my liking - I actually prefer the inspect formatting.

Wondering if we should add a to_fs method or similar that maybe even has a couple of supported formats (inspired by Rails formatting of dates and times) e.g.

user_agent = UserAgentParser.parse "Mozilla/5.0 (Linux; Android 7.0; SAMSUNG SM-G930T Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/5.0 Chrome/51.0.2704.106 Mobile Safari/537.36"
=> #<UserAgentParser::UserAgent Samsung Internet 5.0 (Android 7.0) (Samsung SM-G930T)>
user_agent.to_fs
=> "Samsung Internet 5.0 (Android 7.0)"
user_agent.to_fs(:short)
=> "Samsung Internet 5.0"
user_agent.to_fs(:medium)
=> "Samsung Internet 5.0 (Android 7.0)"
user_agent.to_fs(:long)
=> "Samsung Internet 5.0 (Android 7.0) (Samsung SM-G930T)"

Open to different format suggestions.

Another option would be similar to timestamp formatting "YYYY-MM-DD HH:MM:SS Z" where we had a formatting string such as "F V (O) (D)" but that seems more confusing than helpful and doesn't deal well with optionally present information.