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Line 403 controller_launcher_class
DottedObjectName argument 'helep'. Should that be 'help'?
With this error, IPClusterStart class is probably inheriting 'help' from IPClusterEngines
most certainly, thanks!
I should note that the helep typo only affects the controller_launcher_class help info, which is currently blank as a result, not the rest of the class.
fix helep typo in ipcluster