.withNumber(_ + 10) broken in master

[aryairani]

This expression comes from the docs at http://argonaut.io/doc/json/

// v6.0.4
scala> jNumber(100).withNumber(_ + 10)
res0: argonaut.Json = 110

vs (depending on the exact revision)

scala> jNumber(100).withNumber(_ + 10)
<console>:20: error: type mismatch;
 found   : Int(10)
 required: String
              jNumber(100).get.withNumber(_ + 10)

or in versions where jNumber(100) returns Option[Json]:

scala> jNumber(100).get.withNumber(_ + 10)
<console>:20: error: type mismatch;
 found   : Int(10)
 required: String
              jNumber(100).get.withNumber(_ + 10)

git bisect says b405f23 is the first bad commit:
"Added JsonLong and JsonDouble cases for JsonNumber #116"

[seanparsons]

I'm thinking we might bin this example as it doesn't really apply to the current code.

[julien-truffaut]

you can achieve the same result using with Prism, e.g.

jIntPrism.modify(_ + 10)(jNumber(10)) == jNumber(20)