Check even more carefully for xcode_version
Check even more carefully for xcode_version

Refs Homebrew/homebrew#7236, though honestly I just think @dsarch hasn't updated.
claui/brew,ilovezfs/brew,tonyg/homebrew,EricFromCanada/brew,toonetown/homebrew,muellermartin/dist,gordonmcshane/homebrew,nandub/brew,reelsense/brew,rwhogg/brew,AnastasiaSulyagina/brew,EricFromCanada/brew,muellermartin/dist,aw1621107/brew,toonetown/homebrew,mistydemeo/homebrew,maxim-belkin/brew,reitermarkus/brew,hanxue/linuxbrew,vitorgalvao/brew,gordonmcshane/homebrew,sjackman/homebrew,alyssais/brew,zmwangx/brew,konqui/brew,claui/brew,konqui/brew,AnastasiaSulyagina/brew,AnastasiaSulyagina/brew,alyssais/brew,jmsundar/brew,EricFromCanada/brew,reitermarkus/brew,nandub/brew,aw1621107/brew,vitorgalvao/brew,reitermarkus/brew,bfontaine/brew,reitermarkus/brew,palxex/brew,alyssais/brew,claui/brew,JCount/brew,MikeMcQuaid/brew,maxim-belkin/brew,sjackman/homebrew,toonetown/homebrew,rwhogg/brew,Linuxbrew/brew,EricFromCanada/brew,mistydemeo/homebrew,palxex/brew,pseudocody/brew,hanxue/linuxbrew,gregory-nisbet/brew,vitorgalvao/brew,reelsense/brew,MikeMcQuaid/brew,gordonmcshane/homebrew,JCount/brew,mgrimes/brew,mistydemeo/homebrew,DomT4/brew,tonyg/homebrew,pseudocody/brew,ilovezfs/brew,jmsundar/brew,bfontaine/brew,amar-laksh/brew_sudo,palxex/brew,sjackman/homebrew,gregory-nisbet/brew,maxim-belkin/brew,konqui/brew,staticfloat/brew,muellermartin/dist,JCount/brew,hanxue/linuxbrew,staticfloat/brew,amar-laksh/brew_sudo,Linuxbrew/brew,mgrimes/brew,MikeMcQuaid/brew,zmwangx/brew,DomT4/brew,JCount/brew,pseudocody/brew,claui/brew,DomT4/brew,jmsundar/brew,rwhogg/brew,staticfloat/brew,ilovezfs/brew,MikeMcQuaid/brew,reelsense/brew,Homebrew/brew,amar-laksh/brew_sudo,Homebrew/brew,mgrimes/brew,DomT4/brew,Linuxbrew/brew,tonyg/homebrew,zmwangx/brew,nandub/brew,mahori/brew,konqui/brew,Homebrew/brew,Linuxbrew/brew,mahori/brew,gregory-nisbet/brew,mahori/brew,Homebrew/brew,nandub/brew,sjackman/homebrew,bfontaine/brew,vitorgalvao/brew,aw1621107/brew,mahori/brew