2.1.2 [DOMLevel2Traversal:2000] Section 2.6, Deleting Content with a Range

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V0011:

The specification states:

 Note that if deletion of a Range leaves adjacent Text nodes, they are not 
 automatically merged, and empty Text nodes are not automatically removed. Two Text
  nodes should be joined only if each is the container of one of the boundary-points 
 of a Range whose contents are deleted. To merge adjacent Text nodes, or remove 
 empty text nodes, the normalize() method on the Node interface should be used.

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If a Range corresponds to a complete text node and deleteContents() is called, the empty text node is removed from the tree.