source_fragment

# File actionpack/lib/action_dispatch/middleware/exception_wrapper.rb, line 130
    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