Failing at <https://gerrit.wikimedia.org/r/#/c/mediawiki/extensions/TitleBlacklist/+/442850/>
<https://integration.wikimedia.org/ci/job/quibble-vendor-mysql-hhvm-docker/6239/>
<https://integration.wikimedia.org/ci/job/quibble-vendor-mysql-hhvm-docker/6239/artifact/log/should-be-able-to-create-account.png>
{F23064553 height=200}
```counterexample,name=mw-debug-www.log
..
[authentication] ILLEGAL new account 'User-0.46091149577827273-Iñtërnâtiônà lizætiøn☃' Contains unassigned character "☃" (U+2603)
..
```
Looks like one of the characters added by <https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/441191/> is considered illegal by AntiSpoof. Seems like we should change the default "random" suffix.
Note that this is not the same as T198137 - that test is flaky, this one however, is consistently passing when run without AntiSpoof installed, and consistently failing with it installed.