Correctly set the type of a | b if a is a set or a frozenset
Correctly set the type of a | b if a is a set or a frozenset

molebot/brython,amrdraz/brython,Hasimir/brython,brython-dev/brython,molebot/brython,amrdraz/brython,JohnDenker/brython,jonathanverner/brython,brython-dev/brython,Hasimir/brython,olemis/brython,molebot/brython,JohnDenker/brython,Isendir/brython,Isendir/brython,jonathanverner/brython,kikocorreoso/brython,olemis/brython,Mozhuowen/brython,JohnDenker/brython,brython-dev/brython,jonathanverner/brython,Isendir/brython,jonathanverner/brython,amrdraz/brython,Mozhuowen/brython,Isendir/brython,kikocorreoso/brython,Mozhuowen/brython,Hasimir/brython,Hasimir/brython,molebot/brython,kikocorreoso/brython,JohnDenker/brython,olemis/brython,Mozhuowen/brython,amrdraz/brython,olemis/brython