@LukasReschke Is this okay?
The problem is we want to print `<strong>` but no other html
I see no otherway then combining it with https://github.com/owncloud/apps/pull/1769/files#diff-dffaf6a7a40b2f1ec0be834c5bf5574bR19
```
				<?php print_unescaped(str_replace(
					array('{{beginparamhighlight}}', '{{endparamhighlight}}'),
					array('<strong>', '</strong>'),
					OC_Util::sanitizeHTML(\OCA\Activity\Data::translation($_['event']['app'], $_['event']['subject'], $_['event']['subjectparams'], true, true))
				)) ?>
```
Or is there a way to tell `sanitizeHTML()` that `<strong>` is okay?