typo

--- a/NEWS	Tue Oct 21 17:36:54 1997 +0200
+++ b/NEWS	Tue Oct 21 17:38:31 1997 +0200
@@ -79,7 +79,7 @@
 
 * HOL/simplifier: added infix function `addsplits':
   instead of `<simpset> setloop (split_tac <thms>)'
-  you can simply write `<simpset> adsplits <thms>'
+  you can simply write `<simpset> addsplits <thms>'
 
 * HOL/simplifier: terms of the form
   `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)' (or t=x)