# File lib/webby/core_ext/hash.rb, line 4
  def sanitize!
    h = self.injecting({}) do |h, (k, v)|
          h[k] = case v
                 when 'none', 'nil'; nil
                 when 'true', 'yes'; true
                 when 'false', 'no'; false
                 else v end
        end
    self.replace h
  end