Use `described_class` in `Formulary` spec.
Use `described_class` in `Formulary` spec.

sjackman/homebrew,vitorgalvao/brew,EricFromCanada/brew,nandub/brew,reitermarkus/brew,maxim-belkin/brew,claui/brew,Linuxbrew/brew,Homebrew/brew,Linuxbrew/brew,ilovezfs/brew,nandub/brew,sjackman/homebrew,Homebrew/brew,vitorgalvao/brew,JCount/brew,reitermarkus/brew,claui/brew,MikeMcQuaid/brew,EricFromCanada/brew,mahori/brew,Homebrew/brew,EricFromCanada/brew,mahori/brew,mgrimes/brew,maxim-belkin/brew,hanxue/linuxbrew,konqui/brew,konqui/brew,DomT4/brew,maxim-belkin/brew,claui/brew,mgrimes/brew,konqui/brew,sjackman/homebrew,Linuxbrew/brew,Homebrew/brew,reitermarkus/brew,vitorgalvao/brew,mahori/brew,reitermarkus/brew,konqui/brew,MikeMcQuaid/brew,Linuxbrew/brew,vitorgalvao/brew,sjackman/homebrew,ilovezfs/brew,EricFromCanada/brew,MikeMcQuaid/brew,claui/brew,JCount/brew,ilovezfs/brew,DomT4/brew,MikeMcQuaid/brew,nandub/brew,hanxue/linuxbrew,mgrimes/brew,nandub/brew,DomT4/brew,mahori/brew,JCount/brew,DomT4/brew,hanxue/linuxbrew,JCount/brew