OrderedSet operations do not preserve order #1165
Description
Steps to reproduce:
s1 = OrderedSet('abcd')
s2 = OrderedSet('ca')
print(s1 - s2) # returns {d, b} instead of {b, d}
{{ message }}
Steps to reproduce:
s1 = OrderedSet('abcd')
s2 = OrderedSet('ca')
print(s1 - s2) # returns {d, b} instead of {b, d}