os.path.normcase rationale?

[Chris Withers]

Hi All,

I'm curious as to why, with a file called "Foo.txt" 
os.path.normcase('FoO.txt') will return "foo.txt" rather than "Foo.txt"?

Yes, I know the behaviour is documented, but I'm wondering if anyone can 
remember the rationale for that behaviour?

cheers,

Chris

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