--- a/progs/pow.scala	Mon Nov 14 15:50:42 2016 +0000
+++ b/progs/pow.scala	Sat Jan 07 14:52:26 2017 +0000
@@ -12,6 +12,8 @@
 val B = Set("a", "b", "c", "")
 pow(B, 4).size                            // -> 121
 
+
+
 val B2 = Set("a", "b", "c", "")
 pow(B2, 3).size                           // -> 40