diff -r 499637e8f2c6 -r 0376cccd9118 doc-src/TutorialI/Misc/document/fakenat.tex
--- a/doc-src/TutorialI/Misc/document/fakenat.tex	Wed Oct 11 09:09:06 2000 +0200
+++ b/doc-src/TutorialI/Misc/document/fakenat.tex	Wed Oct 11 10:44:42 2000 +0200
@@ -7,7 +7,7 @@
 The type \isaindexbold{nat}\index{*0|bold}\index{*Suc|bold} of natural
 numbers is predefined and behaves like%
 \end{isamarkuptext}%
-\isacommand{datatype}\ nat\ {\isacharequal}\ \isadigit{0}\ {\isacharbar}\ Suc\ nat\end{isabellebody}%
+\isacommand{datatype}\ nat\ {\isacharequal}\ {\isadigit{0}}\ {\isacharbar}\ Suc\ nat\end{isabellebody}%
 %%% Local Variables:
 %%% mode: latex
 %%% TeX-master: "root"