prepare_skip_lines

# File lib/csv/parser.rb, line 394
    def prepare_skip_lines
      skip_lines = @options[:skip_lines]
      case skip_lines
      when String
        @skip_lines = skip_lines.encode(@encoding)
      when Regexp, nil
        @skip_lines = skip_lines
      else
        unless skip_lines.respond_to?(:match)
          message =
            ":skip_lines has to respond to \#match: #{skip_lines.inspect}"
          raise ArgumentError, message
        end
        @skip_lines = skip_lines
      end
    end