class RDoc::Markdown::Literals

def show_error(io=STDOUT)
  error_pos = @failing_rule_offset
  p = current_pos_info(error_pos)
  io.puts "On line #{p.lno}, column #{p.col}:"
  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    io.puts "Failed to match '#{info.rendered}' (rule '#{info.name}')"
  else
    io.puts "Failed to match rule '#{@failed_rule}'"
  end
  io.puts "Got: #{p.char.inspect}"
  io.puts "=> #{p.line}"
  io.print(" " * (p.col + 2))
  io.puts "^"
end