doc-src/Tutorial/Datatype/triemain.ML

--- a/doc-src/Tutorial/Datatype/triemain.ML	Mon Nov 29 11:12:19 2004 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,2 +0,0 @@
-Goal "!t v bs. lookup (update t as v) bs = \
-\              (if as=bs then Some v else lookup t bs)";