Add mention of code optimization to NEWS.txt

diff --git a/NEWS.txt b/NEWS.txt
index 58c4f4712b883842f63b536cbbd0b366c3584cf5..7e218c1129e2545d3f9de181722668c565d1ceec 100644 (file)
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -1,6 +1,8 @@
 0.10.5 (??/??/2017):
 --------------------
 
+- Minor code optimization.
+
 - Add new key mappings: Backspace (Delete on Mac keyboards) works the same
   as Esc, and Tab works the same as F2/Insert/+. This is done for the
   benefit of new Apple laptops that lack physical Esc and function keys.