error: invalid escape code `\b` in string constant `BAD`
  ╭▸ test/ui/invalid_escape_code.aldrin:1:31
  │
1 │ const BAD = string("\\foo\abar\bbaz\"");
  │       ┬──                     ━━ invalid escape code `\b`
  │       │
  │       string constant defined here
  │
  ╰ help: only `\\` and `\"` are supported