Description
I see the following change in behavior between scala 2.12 and 2.13:
Scala 2.12:
scala> import scala.xml._
import scala.xml._
scala> val a: NodeSeq = <a>Hello</a>
a: scala.xml.NodeSeq = <a>Hello</a>
scala> a ++ <b>hi</b>
res0: scala.xml.NodeSeq = NodeSeq(<a>Hello</a>, <b>hi</b>)
Scala 2.13:
scala> a ++ <b>hi</b>
res0: Seq[scala.xml.Node] = List(<a>Hello</a>, <b>hi</b>)
That change has a very deep reach for us, because Liftweb doesn't interpret both type in the same way: it applies template transformation one time for a NodeSeq (it's only one template), and N times for List[Node] (it's a list of template). Our web application is totally broken, and it's almost impossible to find all places which would need a type ascription (and it would bloat a lot the resulting code.
Is there a way to get back the old behavior? Perhaps we are missing a new implicit? Perhaps the implicit precedence in NodeSeq changed and it could be adpated?
Any insight would be appreciated.
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