2016-10-10: faster output. three-witches-space-in-name

faster output.

diff --git a/examples/enter-three-witches.w b/examples/enter-three-witches.w
--- a/examples/enter-three-witches.w
+++ b/examples/enter-three-witches.w
@@ -33,7 +33,7 @@ define : show str
               . #t
             else
               display : car chars
-              usleep 80000
+              usleep 60000
               lp : cdr chars