ruby.sh: fix if statement
ruby.sh: fix if statement

Co-authored-by: Mike McQuaid <a17fed27eaa842282862ff7c1b9c8395a26ac320@mikemcquaid.com>
Homebrew/brew,JCount/brew,nandub/brew,JCount/brew,nandub/brew,Homebrew/brew,MikeMcQuaid/brew,JCount/brew,nandub/brew,MikeMcQuaid/brew,Homebrew/brew,nandub/brew,MikeMcQuaid/brew,JCount/brew,Homebrew/brew,MikeMcQuaid/brew