Fixed docs for move_to_right_of
Fixed docs for move_to_right_of

It incorrectly stated move left of.
petergoldstein/awesome_nested_set,collectiveidea/awesome_nested_set,sximba/rational_nested_set,tcjuan/awesome_nested_set,oesgalha/awesome_nested_set,experteer/awesome_nested_set,sximba/rational_nested_set,markmercedes/awesome_nested_set,rbo7nik/awesome_nested_set