diff -r fe13743ffc8b -r 3370f6aa3200 doc-src/TutorialI/isabelle.sty
--- a/doc-src/TutorialI/isabelle.sty	Mon Sep 11 17:59:53 2000 +0200
+++ b/doc-src/TutorialI/isabelle.sty	Mon Sep 11 18:00:47 2000 +0200
@@ -6,10 +6,12 @@
 %% macros for Isabelle generated LaTeX output
 %%
 
-%%% Simple document preparation (based on theory token language)
+%%% Simple document preparation (based on theory token language and symbols)
 
 % isabelle environments
 
+\newcommand{\isabellecontext}{UNKNOWN}
+
 \newcommand{\isastyle}{\small\tt\slshape}
 \newcommand{\isastyleminor}{\small\tt\slshape}
 \newcommand{\isastyletext}{\normalsize\rm}