diff -r 7e51c9f3d5a0 -r a5f86aed785b doc-src/TutorialI/Recdef/document/simplification.tex
--- a/doc-src/TutorialI/Recdef/document/simplification.tex	Tue Aug 29 15:13:10 2000 +0200
+++ b/doc-src/TutorialI/Recdef/document/simplification.tex	Tue Aug 29 15:43:29 2000 +0200
@@ -1,4 +1,5 @@
-\begin{isabelle}%
+%
+\begin{isabellebody}%
 %
 \begin{isamarkuptext}%
 Once we have succeeded in proving all termination conditions, the recursion
@@ -100,7 +101,7 @@
 after which we can disable the original simplification rule:%
 \end{isamarkuptext}%
 \isacommand{lemmas}\ {\isacharbrackleft}simp\ del{\isacharbrackright}\ {\isacharequal}\ gcd{\isachardot}simps\isanewline
-\end{isabelle}%
+\end{isabellebody}%
 %%% Local Variables:
 %%% mode: latex
 %%% TeX-master: "root"