Multiline comments mess with parser's line number state.

By example:

// -*- rust -*-

/* 1
 * 2
 * 3
 */
fn main() {
  %; // parse error on line 8, but is reported on line 5 instead.
}

1. Fix some naughtiness of handling newlines in bracequotes and multi-line comments. Closed by a1ecdb103d32551ffb5bf552f95c88292b7eac1c.

   Graydon Hoare at 2010-08-03 23:28:57