SI-9116 Set.subsets has a param list

Now both of the overloaded variants have a parameter list.
This seems to make type inference happier. Or it makes someone
happier.

The user is unaware whether `subsets()` takes a default arg.
But happily, empty application still kicks in.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/pos/t9116.scala b/test/files/pos/t9116.scala
new file mode 100644
index 0000000000..16b04c2e6b
--- /dev/null
+++ b/test/files/pos/t9116.scala
@@ -0,0 +1,7 @@
+
+trait X {
+  List(1, 2, 3).toSet.subsets.map(_.toList)     // ok now
+
+  List(1, 2, 3).toSet.subsets().map(_.toList)   // now also
+  List(1, 2, 3).toSet.subsets(2).map(_.toList)  // still ok
+}