/*if ($_[0] =~ /^\D/) {
@_ = $this->_substituteCellref(@_);
}*/
-
+ if (is_null($token)) {
+ $token = '';
+ }
if (preg_match("/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/", $token)) {
// Match number
return $this->writeNumber($row, $col, $token, $format);