Fix minor cut-and-paste typo.
diff --git a/Doc/lib/email.tex b/Doc/lib/email.tex
index ba2782c..a6ad567 100644
--- a/Doc/lib/email.tex
+++ b/Doc/lib/email.tex
@@ -112,7 +112,7 @@
A subclass of \class{MIMEBase}, the \class{MIMEAudio} class is used to
create MIME message objects of major type \mimetype{audio}.
-\var{_audiodata} is a string containing the raw image data. If this
+\var{_audiodata} is a string containing the raw audio data. If this
data can be decoded by the standard Python module \refmodule{sndhdr},
then the subtype will be automatically included in the
\mailheader{Content-Type} header. Otherwise you can explicitly specify the