Get rid of a bunch more has_key() uses.  We *really* need a tool for this.
test_aepack now passes.  IDLE still needs to be converted (among others).
diff --git a/Lib/plat-mac/bundlebuilder.py b/Lib/plat-mac/bundlebuilder.py
index 266b845..d21fc3e 100755
--- a/Lib/plat-mac/bundlebuilder.py
+++ b/Lib/plat-mac/bundlebuilder.py
@@ -481,7 +481,7 @@
                 if self.standalone or self.semi_standalone:
                     self.includeModules.append("argvemulator")
                     self.includeModules.append("os")
-                if not self.plist.has_key("CFBundleDocumentTypes"):
+                if "CFBundleDocumentTypes" not in self.plist:
                     self.plist["CFBundleDocumentTypes"] = [
                         { "CFBundleTypeOSTypes" : [
                             "****",