Fix get_subject docstring.
diff --git a/src/OpenSSL/crypto.py b/src/OpenSSL/crypto.py
index 0b3f02f..2362f6d 100644
--- a/src/OpenSSL/crypto.py
+++ b/src/OpenSSL/crypto.py
@@ -852,11 +852,13 @@
         """
         Return the subject of this certificate signing request.
 
-        This creates a new :py:class:`X509Name`: modifying it does not affect
-        this request.
+        This creates a new :class:`X509Name` that wraps the underlying subject
+        name field on the certificate signing request. Modifying it will modify
+        the underlying signing request, and will have the effect of modifying
+        any other :class:`X509Name` that refers to this subject.
 
         :return: The subject of this certificate signing request.
-        :rtype: :py:class:`X509Name`
+        :rtype: :class:`X509Name`
         """
         name = X509Name.__new__(X509Name)
         name._name = _lib.X509_REQ_get_subject_name(self._req)