--- a/handouts/ho05.tex	Tue Oct 28 06:01:00 2014 +0000
+++ b/handouts/ho05.tex	Tue Oct 28 12:24:11 2014 +0000
@@ -1,59 +1,25 @@
 \documentclass{article}
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-\usetikzlibrary{shadows}
-\usetikzlibrary{positioning}
-\usetikzlibrary{calc}
-\usetikzlibrary{fit}
-\usetikzlibrary{backgrounds}
+\usepackage{../style}
 \usepackage{../langs}
-
-\newcommand{\dn}{\stackrel{\mbox{\scriptsize def}}{=}}%
+\usepackage{../graphics}
 
-	
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-\def\VS{\Vspace[0.6em]}
-	
 \begin{document}
 
-\section*{Handout 5}
+\section*{Handout 5 (Lexing)}
 
-Whenever you want to design a new programming language or implement a compiler for an
-existing language, the first task is to fix the basic ``words'' of the language. For example what are the 
-keywords, or reserved words, of the language, what are permitted identifiers, numbers, expressions and so 
-on. One convenient way to do this is, of 
-course, by using regular expressions. 
+Whenever you want to design a new programming language or
+implement a compiler for an existing language, the first task
+is to fix the basic ``words'' of the language. For example
+what are the keywords, or reserved words, of the language,
+what are permitted identifiers, numbers, expressions and so
+on. One convenient way to do this is, of course, by using
+regular expressions. 
 
-In this course we want to take a closer look at the 
-WHILE programming language. This is a simple imperative programming language consisting of arithmetic
-expressions, assignments, if-statements and loops. For example the Fibonacci program can be
-written in this language as follows:
+In this course we want to take a closer look at the WHILE
+programming language. This is a simple imperative programming
+language consisting of arithmetic expressions, assignments,
+if-statements and loops. For example the Fibonacci program can
+be written in this language as follows:
 
 \begin{center}
 \mbox{\lstinputlisting[language=while]{../progs/fib.while}}