# File lib/rhc/wizard.rb, line 595
    def ask_for_namespace
      # Ask for a namespace at least once, configure the namespace if a valid,
      # non-blank string is provided.
      namespace = nil
      paragraph do
        begin
          namespace = ask "Please enter a namespace (letters and numbers only)#{namespace_optional? ? " |<none>|" : ""}: " do |q|
            q.responses[:ask_on_error] = ''
          end
        end while !config_namespace(namespace)
      end
    end