diff -r fe13743ffc8b -r 3370f6aa3200 doc-src/TutorialI/Recdef/document/Nested2.tex
--- a/doc-src/TutorialI/Recdef/document/Nested2.tex	Mon Sep 11 17:59:53 2000 +0200
+++ b/doc-src/TutorialI/Recdef/document/Nested2.tex	Mon Sep 11 18:00:47 2000 +0200
@@ -1,5 +1,6 @@
 %
 \begin{isabellebody}%
+\def\isabellecontext{Nested2}%
 %
 \begin{isamarkuptext}%
 \noindent
@@ -22,12 +23,10 @@
 \begin{isamarkuptxt}%
 \noindent
 This leaves us with a trivial base case \isa{trev\ {\isacharparenleft}trev\ {\isacharparenleft}Var\ x{\isacharparenright}{\isacharparenright}\ {\isacharequal}\ Var\ x} and the step case
-%
 \begin{isabelle}%
 \ \ \ \ \ {\isasymforall}t{\isachardot}\ t\ {\isasymin}\ set\ ts\ {\isasymlongrightarrow}\ trev\ {\isacharparenleft}trev\ t{\isacharparenright}\ {\isacharequal}\ t\ {\isasymLongrightarrow}\isanewline
 \ \ \ \ \ trev\ {\isacharparenleft}trev\ {\isacharparenleft}App\ f\ ts{\isacharparenright}{\isacharparenright}\ {\isacharequal}\ App\ f\ ts%
-\end{isabelle}%
-
+\end{isabelle}
 both of which are solved by simplification:%
 \end{isamarkuptxt}%
 \isacommand{by}{\isacharparenleft}simp{\isacharunderscore}all\ add{\isacharcolon}rev{\isacharunderscore}map\ sym{\isacharbrackleft}OF\ map{\isacharunderscore}compose{\isacharbrackright}{\isacharparenright}%
@@ -62,12 +61,10 @@
 \isacommand{recdef} would try to prove the unprovable \isa{size\ t\ {\isacharless}\ Suc\ {\isacharparenleft}term{\isacharunderscore}list{\isacharunderscore}size\ ts{\isacharparenright}}, without any assumption about \isa{t}.  Therefore
 \isacommand{recdef} has been supplied with the congruence theorem
 \isa{map{\isacharunderscore}cong}:
-%
 \begin{isabelle}%
 \ \ \ \ \ {\isasymlbrakk}xs\ {\isacharequal}\ ys{\isacharsemicolon}\ {\isasymAnd}x{\isachardot}\ x\ {\isasymin}\ set\ ys\ {\isasymLongrightarrow}\ f\ x\ {\isacharequal}\ g\ x{\isasymrbrakk}\isanewline
 \ \ \ \ \ {\isasymLongrightarrow}\ map\ f\ xs\ {\isacharequal}\ map\ g\ ys%
-\end{isabelle}%
-
+\end{isabelle}
 Its second premise expresses (indirectly) that the second argument of
 \isa{map} is only applied to elements of its third argument. Congruence
 rules for other higher-order functions on lists would look very similar but