Documentation improvements.
diff --git a/documentation/implementation.sgml b/documentation/implementation.sgml
index 452cbd9..415b42b 100644
--- a/documentation/implementation.sgml
+++ b/documentation/implementation.sgml
@@ -397,7 +397,7 @@
0x37a > 04 @ 0297:0211
</programlisting>
<para>
- As you can see their is a repeating structure starting at
+ As you can see there is a repeating structure starting at
address <literal>0297:01ec</literal> that consists of four io
accesses on the parallel port. Looking at it the first io
access writes a changing byte to the data port the second