--- a/handouts/notation.tex	Fri Sep 25 17:39:02 2015 +0100
+++ b/handouts/notation.tex	Fri Sep 25 20:59:24 2015 +0100
@@ -19,7 +19,7 @@
 are composed of \defn{characters}. While characters are surely
 a familiar concept, we will make one subtle distinction in
 this module. If we want to refer to concrete characters, like
-\code{a}, \code{b} and so on, we use a typewriter font.
+\code{a}, \code{b}, \code{c} and so on, we use a typewriter font.
 Accordingly if we want to refer to the concrete characters of
 my email address we shall write
 
@@ -37,7 +37,7 @@
 
 \noindent But often we do not care which particular characters
 we use. In such cases we use the italic font and write $a$,
-$b$ and so on for characters. Therefore if we need a
+$b$, $c$ and so on for characters. Therefore if we need a
 representative string, we might write
 
 \begin{equation}\label{abracadabra}
@@ -67,7 +67,7 @@
 write this string as
 
 \[
-[\text{\it h, e, l, l, o}]
+[\text{\it h, e, l, l, o}] \;\;\text{or simply}\;\; \textit{hello}
 \]
 
 \noindent The important point is that we can always decompose