diff -r 41f6be79b44f -r 325ead6d9457 doc-src/TutorialI/Misc/document/Tree2.tex
--- a/doc-src/TutorialI/Misc/document/Tree2.tex	Wed Oct 18 23:44:52 2000 +0200
+++ b/doc-src/TutorialI/Misc/document/Tree2.tex	Wed Oct 18 23:58:07 2000 +0200
@@ -1,6 +1,6 @@
 %
 \begin{isabellebody}%
-\def\isabellecontext{Tree2}%
+\def\isabellecontext{Tree{\isadigit{2}}}%
 %
 \begin{isamarkuptext}%
 \noindent In Exercise~\ref{ex:Tree} we defined a function