# File lib/kwartz/error.rb, line 28
    def to_s
      return super unless @linenum
      #return "line #{@linenum}, column #{@column}: " + super
      if @column
        return "#{@filename}:#{@linenum}:#{@column}: " + super
      else
        return "#{@filename}:#{@linenum}: " + super
      end
    end