Minor grammar and typo fixes
diff --git a/Doc/lib/emailmessage.tex b/Doc/lib/emailmessage.tex
index fbf30cf..ecf24eb 100644
--- a/Doc/lib/emailmessage.tex
+++ b/Doc/lib/emailmessage.tex
@@ -132,7 +132,7 @@
\begin{methoddesc}[Message]{__contains__}{name}
Return true if the message object has a field named \var{name}.
-Match is done case-insensitively and \var{name} should not include the
+Matching is done case-insensitively and \var{name} should not include the
trailing colon. Used for the \code{in} operator,
e.g.: