Dennis, I would suggest that the text be left as is, afterall this is essentially a thought exercise where the concept of the short is the important point. Perhaps it might be worth adding for the curious/confused reader, that they replace the short with a very small resistance and use the mathematical tools at their disposal to confirm the concept is as stated.If enough readers would prefer a 0.1 Ohm resistor or other small value in place of the 0 Ohm short, I can rework the schematic, table, and text. I am looking for comments and opinions on what to do if anything.
That's my take, but then I am coming from a more experienced vantage point.
Dave