use a proper m-dash

diff --git a/Doc/library/ipaddress.rst b/Doc/library/ipaddress.rst
index 9625e71b0422bcf114ece03a0157f1e6db6550b3..ca8798058e4dbdce43b6072299f71309f52ca2fc 100644 (file)
--- a/Doc/library/ipaddress.rst
+++ b/Doc/library/ipaddress.rst
@@ -18,8 +18,8 @@ hosts are on the same subnet, iterating over all hosts in a particular
 subnet, checking whether or not a string represents a valid IP address or
 network definition, and so on.
 
-This is the full module API reference - for an overview and introduction,
-see :ref:`ipaddress-howto`.
+This is the full module API reference—for an overview and introduction, see
+:ref:`ipaddress-howto`.
 
 .. versionadded:: 3.3