and the winner is...

Jo Ellen emailed me with the answer to my question about the really long dash. Here is her response:

Hi Bob,

In class you mentioned the elongated hyphen in Harley--Davidison and to email you if we figured it out.. I looked it up and think it is call an em-dash. It is used to create a pause with a bit more emphasis than a comma but a little less than a full stop or period mark. The dash is equal to the width of the letter "M" in the font you are using. Hope I guessed right. Jo