in lib/src/string_scanner.dart [107:121]
void expectChar(int character, {String? name}) {
if (scanChar(character)) return;
if (name == null) {
if (character == $backslash) {
name = r'"\"';
} else if (character == $doubleQuote) {
name = r'"\""';
} else {
name = '"${String.fromCharCode(character)}"';
}
}
_fail(name);
}