Rules for source dump character escape changed in V8

[mraleph]

As a result unescaping code

irhydra/lib/src/modes/v8/code_parser.dart

Lines 119 to 129 in 13a2cd5

	try {
	if (lines.length == 1) {
	final String line = lines.first;
	if (line.contains(r"\x0a")) {
	lines = line.replaceAllMapped(new RegExp(r"\\(x[a-f0-9][a-f0-9]|u[a-f0-9][a-f0-9][a-f0-9][a-f0-9])"), (m) => new String.fromCharCode(int.parse(m.group(1).substring(1), radix: 16)))
	.split('\n');
	}
	}
	} catch (e) {
	print(e);
	}

no longer works. It is not obvious to me how to fix this because I don't see a backwards compatible way to detect whether escaping was applied or not.