Merge pull request #2802 from dotty-staging/fix-nightly-2

Fix nightly build after eta-expansion changes

Author: odersky

sbt-dotty/sbt-test/source-dependencies/implicit-params/B.scala

@@ -1,4 +1,4 @@
 object B extends A
 {
-	val y = x(3)
-}
+	val y: String = x(3)
+}