class Spec::Runner::Formatter::SnippetExtractor

def post_process(highlighted, offending_line)
  new_lines = []
  highlighted.split("\n").each_with_index do |line, i|
    new_line = "<span class=\"linenum\">#{offending_line+i-2}</span>#{line}"
    new_line = "<span class=\"offending\">#{new_line}</span>" if i == 2
    new_lines << new_line
  end
  new_lines.join("\n")
end