[issue2603] Make range __eq__ work

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

No need to get hung-up on the hash function.  I can fix that up after a 
checkin and use something simple like: hashvalue = (start*prime1+seqlen)
*prime2+step.  That doesn't involve object creation and it produces the 
same hash value for range(5,10,2) and range(5,9,2) which are equivalent.

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nosy: +rhettinger

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