Document how .data("name", null/undefined) works

[mikesherov]

From the OP:

Right--that's fine. What's confusing is if the documentation implies that .data("name", null) will have the same effect as .removeData("name"). It will not:

.data("name", null) will set the value to null (future calls to .data("name") will yield null)
.removeData("name") will remove the data item entirely (future calls to .data("name") will yield undefined)

From @rwldrn:

To avoid a re-query of the data- attribute, set the name to a value of null (e.g. .data("name", null)) rather than using .removeData().

[dmethvin]

This looks to have been already fixed.