test_integration_cmds: print output on failure. (#213)
test_integration_cmds: print output on failure. (#213)

Makes it easy to debug what’s gone wrong.
sjackman/homebrew,reitermarkus/brew,Linuxbrew/brew,palxex/brew,DomT4/brew,sjackman/homebrew,MikeMcQuaid/brew,reelsense/brew,sjackman/homebrew,konqui/brew,konqui/brew,JCount/brew,sjackman/homebrew,JCount/brew,ilovezfs/brew,rwhogg/brew,Linuxbrew/brew,vitorgalvao/brew,tonyg/homebrew,Linuxbrew/brew,staticfloat/brew,tonyg/homebrew,hanxue/linuxbrew,zmwangx/brew,reelsense/brew,AnastasiaSulyagina/brew,mahori/brew,MikeMcQuaid/brew,toonetown/homebrew,AnastasiaSulyagina/brew,maxim-belkin/brew,reitermarkus/brew,vitorgalvao/brew,gordonmcshane/homebrew,amar-laksh/brew_sudo,alyssais/brew,Homebrew/brew,jmsundar/brew,mahori/brew,claui/brew,aw1621107/brew,staticfloat/brew,claui/brew,AnastasiaSulyagina/brew,gregory-nisbet/brew,zmwangx/brew,pseudocody/brew,amar-laksh/brew_sudo,toonetown/homebrew,jmsundar/brew,gregory-nisbet/brew,MikeMcQuaid/brew,reitermarkus/brew,aw1621107/brew,nandub/brew,EricFromCanada/brew,reelsense/brew,EricFromCanada/brew,mahori/brew,DomT4/brew,tonyg/homebrew,mgrimes/brew,mgrimes/brew,toonetown/homebrew,jmsundar/brew,bfontaine/brew,nandub/brew,maxim-belkin/brew,Linuxbrew/brew,konqui/brew,alyssais/brew,muellermartin/dist,JCount/brew,aw1621107/brew,rwhogg/brew,claui/brew,nandub/brew,staticfloat/brew,EricFromCanada/brew,JCount/brew,muellermartin/dist,bfontaine/brew,palxex/brew,bfontaine/brew,DomT4/brew,vitorgalvao/brew,Homebrew/brew,mgrimes/brew,zmwangx/brew,konqui/brew,hanxue/linuxbrew,ilovezfs/brew,hanxue/linuxbrew,muellermartin/dist,Homebrew/brew,pseudocody/brew,alyssais/brew,vitorgalvao/brew,reitermarkus/brew,pseudocody/brew,palxex/brew,mahori/brew,ilovezfs/brew,EricFromCanada/brew,claui/brew,rwhogg/brew,MikeMcQuaid/brew,maxim-belkin/brew,DomT4/brew,amar-laksh/brew_sudo,gordonmcshane/homebrew,nandub/brew,Homebrew/brew,gordonmcshane/homebrew,gregory-nisbet/brew