Start rewriting doctest's LaTeX docs.  Damn, this is slow going!
diff --git a/Lib/doctest.py b/Lib/doctest.py
index 80a61c5..7c07131 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1610,7 +1610,7 @@
     are not skipped.
 
     Also test examples reachable from dict m.__test__ if it exists and is
-    not None.  m.__dict__ maps names to functions, classes and strings;
+    not None.  m.__test__ maps names to functions, classes and strings;
     function and class docstrings are tested even if the name is private;
     strings are tested directly, as if they were docstrings.