Conform to py3k dict.{keys, items, values} with some advice from 2b3

M    idlelib/configHandler.py
M    idlelib/ColorDelegator.py
M    idlelib/Delegator.py
M    idlelib/ObjectBrowser.py
M    idlelib/PyShell.py
M    idlelib/Debugger.py
M    idlelib/configDialog.py
M    idlelib/StackViewer.py
M    idlelib/keybindingDialog.py
M    idlelib/tabpage.py
M    idlelib/EditorWindow.py
M    idlelib/WindowList.py
M    idlelib/RemoteDebugger.py
M    idlelib/dynOptionMenuWidget.py
diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index 7616db4..a9b8f72 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -84,7 +84,7 @@
     """
     cache = linecache.cache
     save = {}
-    for filename in cache.keys():
+    for filename in cache:
         if filename[:1] + filename[-1:] == '<>':
             save[filename] = cache[filename]
     orig_checkcache()