Downcase tap parameters in Formula.canonical_name
Downcase tap parameters in Formula.canonical_name

See previous commit's explanation.
MikeMcQuaid/brew,EricFromCanada/brew,maxim-belkin/brew,reitermarkus/brew,JCount/brew,sjackman/homebrew,AnastasiaSulyagina/brew,palxex/brew,konqui/brew,toonetown/homebrew,reitermarkus/brew,aw1621107/brew,Linuxbrew/brew,ilovezfs/brew,DomT4/brew,jmsundar/brew,muellermartin/dist,tonyg/homebrew,sjackman/homebrew,ilovezfs/brew,zmwangx/brew,tonyg/homebrew,alyssais/brew,pseudocody/brew,Homebrew/brew,muellermartin/dist,tonyg/homebrew,palxex/brew,AnastasiaSulyagina/brew,nandub/brew,gregory-nisbet/brew,toonetown/homebrew,reitermarkus/brew,MikeMcQuaid/brew,mistydemeo/homebrew,bfontaine/brew,rwhogg/brew,gordonmcshane/homebrew,EricFromCanada/brew,palxex/brew,EricFromCanada/brew,maxim-belkin/brew,MikeMcQuaid/brew,claui/brew,nandub/brew,zmwangx/brew,bfontaine/brew,pseudocody/brew,claui/brew,JCount/brew,konqui/brew,Linuxbrew/brew,jmsundar/brew,DomT4/brew,amar-laksh/brew_sudo,mahori/brew,pseudocody/brew,gregory-nisbet/brew,amar-laksh/brew_sudo,reelsense/brew,muellermartin/dist,staticfloat/brew,alyssais/brew,rwhogg/brew,mahori/brew,bfontaine/brew,toonetown/homebrew,mistydemeo/homebrew,mahori/brew,mistydemeo/homebrew,hanxue/linuxbrew,claui/brew,mgrimes/brew,vitorgalvao/brew,DomT4/brew,Homebrew/brew,alyssais/brew,rwhogg/brew,aw1621107/brew,amar-laksh/brew_sudo,reitermarkus/brew,jmsundar/brew,Homebrew/brew,gregory-nisbet/brew,hanxue/linuxbrew,sjackman/homebrew,EricFromCanada/brew,nandub/brew,Homebrew/brew,mgrimes/brew,zmwangx/brew,AnastasiaSulyagina/brew,mahori/brew,vitorgalvao/brew,staticfloat/brew,ilovezfs/brew,mgrimes/brew,Linuxbrew/brew,sjackman/homebrew,DomT4/brew,claui/brew,aw1621107/brew,reelsense/brew,vitorgalvao/brew,vitorgalvao/brew,konqui/brew,hanxue/linuxbrew,Linuxbrew/brew,gordonmcshane/homebrew,JCount/brew,JCount/brew,gordonmcshane/homebrew,nandub/brew,MikeMcQuaid/brew,maxim-belkin/brew,konqui/brew,staticfloat/brew,reelsense/brew