add missing doco for override_rdclass parameter

diff --git a/dns/rdataset.py b/dns/rdataset.py
index 2e3b4d4ad609369cb459228a6b5ec2c48e6a9d69..45f8bd6921474f367e444d8094f1595c3dcba2e5 100644 (file)
--- a/dns/rdataset.py
+++ b/dns/rdataset.py
@@ -196,6 +196,9 @@ class Rdataset(dns.set.Set):
         *relativize*, a ``bool``.  If ``True``, names will be relativized
         to *origin*.
 
+        *override_rdclass*, a ``dns.rdataclass.RdataClass`` or ``None``.
+        If not ``None``, use this class instead of the Rdataset's class.
+
         *want_comments*, a ``bool``.  If ``True``, emit comments for rdata
         which have them.  The default is ``False``.
         """