source_fragment

# File actionpack/lib/action_dispatch/middleware/exception_wrapper.rb, line 123
      def source_fragment(path, line)
        return unless Rails.respond_to?(:root) && Rails.root
        full_path = Rails.root.join(path)
        if File.exist?(full_path)
          File.open(full_path, "r") do |file|
            start = [line - 3, 0].max
            lines = file.each_line.drop(start).take(6)
            Hash[*(start + 1..(lines.count + start)).zip(lines).flatten]
          end
        end
      end