class RDoc::Markdown::Literals

def failure_oneline
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset
  char = lines[l-1][c-1, 1]
  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    "@#{l}:#{c} failed rule '#{info.name}', got '#{char}'"
  else
    "@#{l}:#{c} failed rule '#{@failed_rule}', got '#{char}'"
  end
end