message: Fixed docs on how to obtain parser error.
diff: @@ -479,7 +479,7 @@ include paths. If not specified, any include statements try to resolve from
  the current directory.
  If there were any parsing errors, `Parse` will return `false`, and
  -`Parser::err` contains a human readable error string with a line number
  +`Parser::error_` contains a human readable error string with a line number
  etc, which you should present to the creator of that file.
  After each JSON file, the `Parser::fbb` member variable is the
  