is_code? (Rcov::FileStatistics)

    # File lib/rcov.rb, line 152
      def is_code?(lineno)
        unless @is_begin_comment
          @is_begin_comment = Array.new(@lines.size, false)
          pending = []
          state = :code
          @lines.each_with_index do |line, index|
            case state
            when :code
              if /^=begin\b/ =~ line
                state = :comment
                pending << index
              end
            when :comment
              pending << index
              if /^=end\b/ =~ line
                state = :code
                pending.each{|idx| @is_begin_comment[idx] = true}
                pending.clear
              end
            end
          end
        end
        @lines[lineno] && !@is_begin_comment[lineno] &&
          @lines[lineno] !~ /^\s*(#|$)/
      end