https://hylo-lang.org/introduction/:

> Okay, okay. Here’s the kind of program we envision writing in Hylo:

    subscript longer_of(_ a: inout String, _ b: inout String): String {
      if b.count() > a.count() { yield &b } else { yield &a }
    }

The combination of a “String” result type and “yield &b” feels weird to me. Is that a typo?