update.sh: improve verbose output and readability. (#486)
update.sh: improve verbose output and readability. (#486)

Would have made it easier to debug
https://github.com/Homebrew/homebrew-core/issues/2804 where wasn't clear which
directory was causing the issue.
jmsundar/brew,bfontaine/brew,EricFromCanada/brew,DomT4/brew,jmsundar/brew,hanxue/linuxbrew,Homebrew/brew,claui/brew,Homebrew/brew,claui/brew,claui/brew,mahori/brew,JCount/brew,rwhogg/brew,reitermarkus/brew,tonyg/homebrew,nandub/brew,tonyg/homebrew,amar-laksh/brew_sudo,gregory-nisbet/brew,sjackman/homebrew,ilovezfs/brew,gregory-nisbet/brew,hanxue/linuxbrew,konqui/brew,nandub/brew,sjackman/homebrew,reelsense/brew,AnastasiaSulyagina/brew,alyssais/brew,pseudocody/brew,gordonmcshane/homebrew,MikeMcQuaid/brew,Linuxbrew/brew,mgrimes/brew,gordonmcshane/homebrew,vitorgalvao/brew,gordonmcshane/homebrew,JCount/brew,aw1621107/brew,palxex/brew,aw1621107/brew,reitermarkus/brew,EricFromCanada/brew,pseudocody/brew,JCount/brew,ilovezfs/brew,reelsense/brew,maxim-belkin/brew,zmwangx/brew,vitorgalvao/brew,tonyg/homebrew,DomT4/brew,palxex/brew,AnastasiaSulyagina/brew,Homebrew/brew,Homebrew/brew,toonetown/homebrew,konqui/brew,amar-laksh/brew_sudo,amar-laksh/brew_sudo,Linuxbrew/brew,mgrimes/brew,rwhogg/brew,muellermartin/dist,toonetown/homebrew,mahori/brew,sjackman/homebrew,palxex/brew,EricFromCanada/brew,konqui/brew,claui/brew,aw1621107/brew,DomT4/brew,konqui/brew,JCount/brew,DomT4/brew,zmwangx/brew,AnastasiaSulyagina/brew,toonetown/homebrew,mgrimes/brew,jmsundar/brew,reelsense/brew,gregory-nisbet/brew,nandub/brew,Linuxbrew/brew,nandub/brew,alyssais/brew,reitermarkus/brew,muellermartin/dist,rwhogg/brew,hanxue/linuxbrew,maxim-belkin/brew,MikeMcQuaid/brew,EricFromCanada/brew,MikeMcQuaid/brew,maxim-belkin/brew,sjackman/homebrew,mahori/brew,bfontaine/brew,ilovezfs/brew,alyssais/brew,bfontaine/brew,zmwangx/brew,Linuxbrew/brew,MikeMcQuaid/brew,muellermartin/dist,vitorgalvao/brew,vitorgalvao/brew,reitermarkus/brew,mahori/brew,pseudocody/brew