Bug in Serialize RDF as JSON-LD Algorithm

[kal]

In step 5.3.3, if the value of the @id member of node is not a blank node identifier the loop should terminate. The start of this step should therefore read something like:

While property equals rdf:rest, the value of the @id member of node is a blank node identifier,
the array value of the member of node usages map associated with the @id member of node has only one member,

(addition highlighted)

[gkellogg]

Step 5.3.3.5 terminates the loop after appending values to array and updating node. However, I note that my implementation checks to see that node is a blank node in the same place you suggest. This seems like a good change to me.

@dlongley @lanthaler?