[1.8.x] Limited line length in docs/ref/contrib/messages.txt example.
[1.8.x] Limited line length in docs/ref/contrib/messages.txt example.

Backport of d35f184b20743352dc41f1272184005054a36ae7 from master

h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy