diff -r d5509912af18 -r c753196599f9 doc-src/TutorialI/Recdef/document/Nested1.tex
--- a/doc-src/TutorialI/Recdef/document/Nested1.tex	Tue Aug 29 11:52:47 2000 +0200
+++ b/doc-src/TutorialI/Recdef/document/Nested1.tex	Tue Aug 29 12:08:20 2000 +0200
@@ -1,4 +1,5 @@
-\begin{isabelle}%
+%
+\begin{isabellebody}%
 \isacommand{consts}\ trev\ \ {\isacharcolon}{\isacharcolon}\ {\isachardoublequote}{\isacharparenleft}{\isacharprime}a{\isacharcomma}{\isacharprime}b{\isacharparenright}term\ {\isacharequal}{\isachargreater}\ {\isacharparenleft}{\isacharprime}a{\isacharcomma}{\isacharprime}b{\isacharparenright}term{\isachardoublequote}%
 \begin{isamarkuptext}%
 \noindent
@@ -38,7 +39,7 @@
 We will now prove the termination condition and continue with our definition.
 Below we return to the question of how \isacommand{recdef} ``knows'' about \isa{map}.%
 \end{isamarkuptext}%
-\end{isabelle}%
+\end{isabellebody}%
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