RFR: 8197594 - String and character repeat

[Martin Buchholz]

On Sun, Feb 18, 2018 at 1:37 AM, James Laskey <james.laskey at oracle.com>
wrote:

> Didn’t I hear someone mentioning “\U1D11A” at some point?
>

Unicode codepoint escapes are still Not a Thing, apparently.
Yes, it's a language feature, but an easy one to implement.
Except for the usual bikeshedding about syntax
 - include the '+'?
 - how many digits to consume after the escape?  How much do we trust
Unicode to never ever grow beyond 5 hex digits?