docs/Common-Issues.md: fix variable notation
docs/Common-Issues.md: fix variable notation
JCount/brew,Homebrew/brew,nandub/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,nandub/brew,Homebrew/brew,nandub/brew,Homebrew/brew,nandub/brew,JCount/brew,MikeMcQuaid/brew,Homebrew/brew,JCount/brew,MikeMcQuaid/brew,JCount/brew