More explicit empty paren lists in method calls.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/collection/immutable/TreeSet.scala b/src/library/scala/collection/immutable/TreeSet.scala
index 67668b3bef..26c3d44bbb 100644
--- a/src/library/scala/collection/immutable/TreeSet.scala
+++ b/src/library/scala/collection/immutable/TreeSet.scala
@@ -89,7 +89,7 @@ class TreeSet[A] private (tree: RB.Tree[A, Unit])(implicit val ordering: Orderin
   private[this] def countWhile(p: A => Boolean): Int = {
     var result = 0
     val it = iterator
-    while (it.hasNext && p(it.next)) result += 1
+    while (it.hasNext && p(it.next())) result += 1
     result
   }
   override def dropWhile(p: A => Boolean) = drop(countWhile(p))