An empty line in a reply renders as:
```
::Foo
::
::Bar
```
It is likely that the user just didn't realise that in the reply tool context, double newlines are not required (as they are in a normal wikitext context) due to the indentation.
These empty list items are invisible, and likely not intended by the user, so it should be safe to remove them.
=== Example cases
|**Behavior**|**Wiki**|**Link**|
|--- | --- |
| Wrong indentation (`::` instead of `:`) | NL | https://nl.wikipedia.org/w/index.php?title=Overleg_gebruiker:Ymnes&curid=5123323&diff=55992402&oldid=55992396
| Wrong indentation (`:::` instead of `:`) | HU | https://hu.wikipedia.org/w/index.php?title=Szerkesztővita:Palotabarát&curid=1468839&diff=22443144&oldid=22442730
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدمة:Wisam85&curid=6528687&diff=45545104&oldid=45544952
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدمة:شيماء&curid=7331385&diff=45550233&oldid=45549485
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدمة:شيماء&curid=7331385&diff=45576445&oldid=45576384
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدم:Dr-Taher&curid=730507&diff=45588873&oldid=45583567
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدمة:شيماء&curid=7331385&diff=45588566&oldid=45588557
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدم:فيصل&curid=1786729&diff=45605624&oldid=45605410
| Wrong indentation (`::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدم:فيصل&curid=1786729&diff=45602713&oldid=45602706
| Wrong indentation (`:::` instead of `:`) | AR | https://ar.wikipedia.org/w/index.php?title=نقاش_المستخدمة:شيماء&curid=7331385&diff=45660565&oldid=45660453