Fix "not not" typo in controller guides
Fix "not not" typo in controller guides

gjaldon/phoenix,dmarkow/phoenix,Kosmas/phoenix,Joe-noh/phoenix,pap/phoenix,optikfluffel/phoenix,eksperimental/phoenix,mschae/phoenix,Joe-noh/phoenix,phoenixframework/phoenix,mobileoverlord/phoenix,nshafer/phoenix,rafbgarcia/phoenix,mobileoverlord/phoenix,Gazler/phoenix,dmarkow/phoenix,stevedomin/phoenix,keathley/phoenix,jwarwick/phoenix,0x00evil/phoenix,michalmuskala/phoenix,rafbgarcia/phoenix,gjaldon/phoenix,korobkov/phoenix,trarbr/phoenix,evax/phoenix,0x00evil/phoenix,keathley/phoenix,jwarwick/phoenix,evax/phoenix,optikfluffel/phoenix,eksperimental/phoenix,phoenixframework/phoenix,korobkov/phoenix,mitchellhenke/phoenix,Gazler/phoenix,bsmr-erlang/phoenix,michalmuskala/phoenix,optikfluffel/phoenix,pap/phoenix,nshafer/phoenix,phoenixframework/phoenix,bsmr-erlang/phoenix,rafbgarcia/phoenix,mitchellhenke/phoenix,mschae/phoenix,trarbr/phoenix,Kosmas/phoenix,stevedomin/phoenix,nshafer/phoenix,0x00evil/phoenix