When creating a new article in the source editor, a box with the message newarticletext appears at the top. It doesn't appear in the VisualEditor.
Compare:
source: https://en.wikipedia.org/w/index.php?title=Aklotspa&action=edit
VE: https://en.wikipedia.org/wiki/Aklotspa?veaction=edit
Version: unspecified
Severity: trivial