Fix wrong type in unordered_multiset::swap() (GH-4408)
Fix wrong type in unordered_multiset::swap() (GH-4408)


cython/cython,scoder/cython,da-woods/cython,cython/cython,scoder/cython,cython/cython,cython/cython,da-woods/cython,scoder/cython,da-woods/cython,scoder/cython,da-woods/cython