Failed compilation of BufferLike

[DarkDimius]

We need to see if this is something we can fix on dotty side or cover with migration tool:

/Users/dark/workspace/dotty/scala-scala/src/library/scala/collection/mutable/BufferLike.scala:204: error: type mismatch:
 found   : scala.collection.script.Message[A(in BufferLike)] => U
 required: scala.collection.script.Message[s.A(in Script)] => U
    case s: Script[_]           => s.iterator foreach <<
                                                        ^

lampepfl/scala@1658a75
Fixes compilation error on the library side.

[odersky]

Fixed completely by #1401