Improve naming of parameter type.

Author: odersky

src/dotty/tools/dotc/typer/EtaExpansion.scala

@@ -57,8 +57,8 @@ object EtaExpansion {
   /** Lift arguments that are not-idempotent into ValDefs in buffer `defs`
    *  and replace by the idents of so created ValDefs.
    */
-  def liftArgs(defs: mutable.ListBuffer[Tree], methType: Type, args: List[Tree])(implicit ctx: Context) =
-    methType.widen match {
+  def liftArgs(defs: mutable.ListBuffer[Tree], methRef: Type, args: List[Tree])(implicit ctx: Context) =
+    methRef.widen match {
       case MethodType(paramNames, paramTypes) =>
         (args, paramNames, paramTypes).zipped map { (arg, name, tp) =>
           if (tp.isInstanceOf[ExprType]) arg