# File lib/rdoc/rd/block_parser.rb, line 318
def on_error(et, ev, _values)
  prv, cur, nxt = format_line_num(@i, @i+1, @i+2)

  raise ParseError, "\nRD syntax error: line \#{@i+1}:\n  \#{prv}  |\#{@src[@i-1].chomp}\n  \#{cur}=>|\#{@src[@i].chomp}\n  \#{nxt}  |\#{@src[@i+1].chomp}\n\n"
end