diff -r eacce1cd716a -r 05fc32a23b8b doc-src/TutorialI/Misc/document/fakenat.tex
--- a/doc-src/TutorialI/Misc/document/fakenat.tex	Tue Aug 16 13:42:21 2005 +0200
+++ b/doc-src/TutorialI/Misc/document/fakenat.tex	Tue Aug 16 13:42:23 2005 +0200
@@ -1,16 +1,40 @@
 %
 \begin{isabellebody}%
 \def\isabellecontext{fakenat}%
-\isamarkupfalse%
+%
+\isadelimtheory
+%
+\endisadelimtheory
+%
+\isatagtheory
+%
+\endisatagtheory
+{\isafoldtheory}%
+%
+\isadelimtheory
+%
+\endisadelimtheory
+\isamarkuptrue%
 %
 \begin{isamarkuptext}%
 \noindent
 The type \tydx{nat} of natural
 numbers is predefined to have the constructors \cdx{0} and~\cdx{Suc}.  It  behaves as if it were declared like this:%
 \end{isamarkuptext}%
-\isamarkuptrue%
-\isacommand{datatype}\ nat\ {\isacharequal}\ {\isadigit{0}}\ {\isacharbar}\ Suc\ nat\isamarkupfalse%
 \isamarkupfalse%
+\isacommand{datatype}\ nat\ {\isacharequal}\ {\isadigit{0}}\ {\isacharbar}\ Suc\ nat%
+\isadelimtheory
+%
+\endisadelimtheory
+%
+\isatagtheory
+%
+\endisatagtheory
+{\isafoldtheory}%
+%
+\isadelimtheory
+%
+\endisadelimtheory
 \end{isabellebody}%
 %%% Local Variables:
 %%% mode: latex