#4811: fix markup glitches (mostly remains of the conversion),
found by Gabriel Genellina.
diff --git a/Doc/library/smtplib.rst b/Doc/library/smtplib.rst
index bdbbe4a..385f116 100644
--- a/Doc/library/smtplib.rst
+++ b/Doc/library/smtplib.rst
@@ -207,7 +207,7 @@
    previous ``EHLO`` or ``HELO`` command this session.  It tries ESMTP ``EHLO``
    first.
 
-   :exc:SMTPHeloError
+   :exc:`SMTPHeloError`
      The server didn't reply properly to the ``HELO`` greeting.
 
    .. versionadded:: 2.6