After 23e66f4 Ometa/JS serialize escaped chars, but still can't parse it back.
Fix for parsing \u and \x escaped chars.
Fix parsing \uHHH and \xHH (it's possible to be chars, not only numbe…
Thanks for pointing this out. I didn't realize that this was a pull request, so I wrote my own fix and committed it. :) (My commit also fixes this issue in the OMeta parser, and restricts the digits after the \x and \u to hexadecimal digits, not just any character.)