remove most uses of list(somedict.keys()) in Demo scripts
diff --git a/Demo/pdist/cmdfw.py b/Demo/pdist/cmdfw.py
index 7bcb461..ec854b1 100755
--- a/Demo/pdist/cmdfw.py
+++ b/Demo/pdist/cmdfw.py
@@ -104,9 +104,7 @@
             c = c.__bases__[0]
         if docstrings:
             print("where subcommand can be:")
-            names = list(docstrings.keys())
-            names.sort()
-            for name in names:
+            for name in sorted(docstrings.keys()):
                 print(docstrings[name])
         if self.PostUsageMessage:
             print(self.PostUsageMessage)