Aliasing double_knot → multi_knot
Link to alias

Reason:

Based on the name I assumed double_knot was more like double_penetration with 2 knots, but it actually means more than one knot on the same character.

Anyways...double_knot (53) currently implies multi_knot (47), but there are actually more double_knot posts... which means that I doubt anybody is using them any differently anyways and this would be more handy to have if a 3-knotted character came along.