fixup! Added documentation on extension class instantiation from existing pointer
fixup! Added documentation on extension class instantiation from existing pointer

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