indicate msg is an argument
diff --git a/Doc/library/smtplib.rst b/Doc/library/smtplib.rst
index 5978a8f..3101ab7 100644
--- a/Doc/library/smtplib.rst
+++ b/Doc/library/smtplib.rst
@@ -281,10 +281,10 @@
envelope used by the transport agents. ``sendmail`` does not modify the
message headers in any way.
- msg may be a string containing characters in the ASCII range, or a byte
+ *msg* may be a string containing characters in the ASCII range, or a byte
string. A string is encoded to bytes using the ascii codec, and lone ``\r``
- and ``\n`` characters are converted to ``\r\n`` characters. A byte string
- is not modified.
+ and ``\n`` characters are converted to ``\r\n`` characters. A byte string is
+ not modified.
If there has been no previous ``EHLO`` or ``HELO`` command this session, this
method tries ESMTP ``EHLO`` first. If the server does ESMTP, message size and