Add multiline attributes example to reference doc
Add multiline attributes example to reference doc

frankvdp/HamlPy,nyaruka/django-hamlpy,GetHappie/HamlPy,frankvdp/HamlPy,frankvdp/HamlPy,Psycojoker/HamlPy,GetHappie/HamlPy,GetHappie/HamlPy,Psycojoker/HamlPy,jessemiller/HamlPy,jessemiller/HamlPy,GetHappie/HamlPy,jessemiller/HamlPy,nyaruka/django-hamlpy,frankvdp/HamlPy,Psycojoker/HamlPy