Some wording changes and markup fixes
diff --git a/Doc/lib/libsmtplib.tex b/Doc/lib/libsmtplib.tex
index 9943d9f..611cd01 100644
--- a/Doc/lib/libsmtplib.tex
+++ b/Doc/lib/libsmtplib.tex
@@ -32,12 +32,12 @@
local_hostname\optional{,
keyfile\optional{,
certfile}}}}}}
-A \class{SMTP_SSL} instance behaves exactly the same as instance \class{SMTP}.
-\class{SMTP_SSL} should be used for the situations where SSL is required from
-the beginning of the connection and \method{starttls()} is not appropriate.
-If host is not specified, the local host is used. If port is
-omitted, the standard SMTP-over-SSL port (465) is used. keyfile and certfile
-are also optional - they can contain a PEM formatted private key and
+A \class{SMTP_SSL} instance behaves exactly the same as instances of \class{SMTP}.
+\class{SMTP_SSL} should be used for situations where SSL is required from
+the beginning of the connection and using \method{starttls()} is not appropriate.
+If \var{host} is not specified, the local host is used. If \var{port} is
+omitted, the standard SMTP-over-SSL port (465) is used. \var{keyfile} and \var{certfile}
+are also optional, and can contain a PEM formatted private key and
certificate chain file for the SSL connection.
\end{classdesc}