Sort string alternatives

[Michael Schmidt]

The order of string alternatives (e.g. \q{foo|bar}) does not matter, so it would be nice if they could automatically be sorted. The semantics and functionality should be the same as sort-alternatives.

I'm not sure whether sorting string alternatives should be a new rule or whether it should be part of sort-alterantives.

[Yosuke Ota]

Good idea!
In my opinion, it's a feature included in sort-alternatives rule.