fix(brew_install): make subprocess.check_output return str
fix(brew_install): make subprocess.check_output return str

This fix makes the `brew_install` rule work on Python 3.

Signed-off-by: Pablo Santiago Blum de Aguiar <75c272ccdbf7bf39788ea4389a92597bd05e623e@gmail.com>

thesoulkiller/thefuck,LawrenceHan/thefuck,MJerty/thefuck,levythu/thefuck,Clpsplug/thefuck,hxddh/thefuck,scorphus/thefuck,barneyElDinosaurio/thefuck,bigplus/thefuck,mcarton/thefuck,levythu/thefuck,thinkerchan/thefuck,suxinde2009/thefuck,mlk/thefuck,sekaiamber/thefuck,roth1002/thefuck,nwinkler/thefuck,gaurav9991/thefuck,bigplus/thefuck,qingying5810/thefuck,PLNech/thefuck,barneyElDinosaurio/thefuck,beni55/thefuck,MJerty/thefuck,SimenB/thefuck,redreamality/thefuck,petr-tichy/thefuck,lawrencebenson/thefuck,subajat1/thefuck,BertieJim/thefuck,PLNech/thefuck,SimenB/thefuck,artiya4u/thefuck,redreamality/thefuck,Clpsplug/thefuck,thinkerchan/thefuck,zhangzhishan/thefuck,LawrenceHan/thefuck,mcarton/thefuck,AntonChankin/thefuck,roth1002/thefuck,nvbn/thefuck,vanita5/thefuck,ytjiang/thefuck,nvbn/thefuck,hxddh/thefuck,subajat1/thefuck,Aeron/thefuck,manashmndl/thefuck,AntonChankin/thefuck,manashmndl/thefuck,beni55/thefuck,thesoulkiller/thefuck,scorphus/thefuck,princeofdarkness76/thefuck,NguyenHoaiNam/thefuck,vanita5/thefuck,bugaevc/thefuck,lawrencebenson/thefuck,ostree/thefuck,qrqiuren/thefuck,ostree/thefuck,BertieJim/thefuck,mbbill/thefuck,mlk/thefuck,princeofdarkness76/thefuck,gogobebe2/thefuck