[pypy-issue] [issue1183] set difference operator does not return a new set if the 2nd operand is an empty set

[Lukas Diekmann]

Lukas Diekmann <Lukas.Diekmann at uni-duesseldorf.de> added the comment:

for sets with completely different content, set.difference returned a set that 
shared the storage of the first set. fixed.

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status: unread -> resolved

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