too many changes for one commit

- simplify envelope code
- add more files as optional
- allow compiling optional without editing tcr.tex
- formatting changes

1 files changed, 2 insertions, 2 deletions

diff --git a/java/java.tex b/java/java.tex
index bc656ff..9429106 100644
--- a/java/java.tex
+++ b/java/java.tex
@@ -3,7 +3,7 @@
 \lstset{language=Java}
 
 \optional{
-\subsection{Introduction}
+\subsection{Introduction \opthint}
 
 \begin{itemize}
 	\item Compilen: \code{javac main.java}
@@ -31,7 +31,7 @@
 }
 
 \optional{
-\subsection{BigInteger}
+\subsection{BigInteger \opthint}
 \sourcecode{java/bigInteger.java}
 }
 \endgroup