2.7 -> 3.1 versionchanges.
diff --git a/Doc/library/pdb.rst b/Doc/library/pdb.rst
index 0b29c2c..678ae28 100644
--- a/Doc/library/pdb.rst
+++ b/Doc/library/pdb.rst
@@ -144,7 +144,7 @@
 
       import pdb; pdb.Pdb(skip=['django.*']).set_trace()
 
-   .. versionadded:: 2.7
+   .. versionadded:: 3.1
       The *skip* argument.
 
    .. method:: run(statement[, globals[, locals]])