--- a/doc-src/TutorialI/Misc/document/fakenat.tex Mon Aug 21 19:03:58 2000 +0200
+++ b/doc-src/TutorialI/Misc/document/fakenat.tex Mon Aug 21 19:17:07 2000 +0200
@@ -5,7 +5,7 @@
The type \isaindexbold{nat}\index{*0|bold}\index{*Suc|bold} of natural
numbers is predefined and behaves like%
\end{isamarkuptext}%
-\isacommand{datatype}\ nat\ =\ 0\ |\ Suc\ nat\end{isabelle}%
+\isacommand{datatype}\ nat\ {\isacharequal}\ \isadigit{0}\ {\isacharbar}\ Suc\ nat\end{isabelle}%
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