to_switches

# File lib/bundler/vendor/thor/lib/thor/parser/options.rb, line 11
    def self.to_switches(options)
      options.map do |key, value|
        case value
        when true
          "--#{key}"
        when Array
          "--#{key} #{value.map(&:inspect).join(' ')}"
        when Hash
          "--#{key} #{value.map { |k, v| "#{k}:#{v}" }.join(' ')}"
        when nil, false
          nil
        else
          "--#{key} #{value.inspect}"
        end
      end.compact.join(" ")
    end