brew.sh: avoid unnecessary 'cat'
brew.sh: avoid unnecessary 'cat'

Bash can read directly from a file in its command substitution.

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