doc-src/Tutorial/ToyList/lemma3

--- a/doc-src/Tutorial/ToyList/lemma3	Mon Nov 29 11:12:19 2004 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,3 +0,0 @@
-Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
-by(induct_tac "xs" 1);
-by(Auto_tac);