Fix compilation error on Dotty

Author: julienrf

src/main/scala/strawman/collection/Factories.scala

@@ -48,7 +48,7 @@ trait BuildFromLowPriority {
   }
 
   /** Build the source collection type from an Iterable with SortedOps */
-  implicit def buildFromSortedOps[CC[X] <: Iterable[X] with SortedOps[X, CC, CC[X]], A, E : Ordering]: BuildFrom[CC[A], E, CC[E]] = new BuildFrom[CC[A], E, CC[E]] {
+  implicit def buildFromSortedOps[CC[X] <: Iterable[X] with SortedOps[X, CC, _], A, E : Ordering]: BuildFrom[CC[A], E, CC[E]] = new BuildFrom[CC[A], E, CC[E]] {
     def newBuilder(from: CC[A]): Builder[E, CC[E]] = from.sortedIterableFactory.newBuilder[E]()
     def fromSpecificIterable(from: CC[A])(it: Iterable[E]): CC[E] = from.sortedIterableFactory.fromSpecificIterable(it)
   }

src/test/scala/strawman/collection/test/GenericTest.scala

@@ -36,8 +36,6 @@ object Parse {
     parts.foldLeft[Option[Builder[A, C]]](Some(bf.newBuilder)) { (maybeBuilder, s) =>
       (maybeBuilder, parseA.parse(s)) match {
         case (Some(builder), Some(a)) =>
-          scala.Predef.println(a)
-          scala.Predef.println(builder.result)
           Some(builder += a)
         case _ => None
       }

src/test/scala/strawman/collection/test/TraverseTest.scala

@@ -44,7 +44,7 @@ class TraverseTest {
       case (Right(builder), Right(b)) => Right(builder += b)
       case (Left(a)       ,        _) => Left(a)
       case (_             ,  Left(a)) => Left(a)
-    }.map(_.result)
+    }.right.map(_.result)
 
   @Test
   def optionSequence1Test: Unit = {