rstify the docstring a little more
diff --git a/OpenSSL/crypto.py b/OpenSSL/crypto.py
index 1d0f494..09481a4 100644
--- a/OpenSSL/crypto.py
+++ b/OpenSSL/crypto.py
@@ -701,7 +701,7 @@
         """
         Get extensions to the request.
 
-        :return: A list of X509Extension objects.
+        :return: A :py:class:`list` of :py:class:`X509Extension` objects.
         """
         exts = []
         native_exts_obj = _lib.X509_REQ_get_extensions(self._req)