(my browser farted the half finished report into existence :P )

The __eq__() implementation of the path-based loaders in importlib is just the stock one that compares object identity.  So two that are effectively the same compare unequal.  This has a material impact on ModuleSpec.  ModuleSpec.__eq__() does a comparision of its various attributes, one of them being the loader.  Thus most specs will compare unequal even though they are effectively equal.

I recommend that we provide a better implementation for SourceFileLoader and friends.

Larry: would such a feature addition be okay?