Thanks for your friendly reply.  It is great to hear that GIS courses are including OpenStreetMap. It is intersting that your GIS instructor would have you edit OpenStreetMap without giving you some instructions as to what is allowed, and/or touching on intellectual property (IP) rights in general - which is applicable to GIS too.

Your edit cannot be restored because it is "contaminated" by having violated Google's Terms of Service in creating it.  You are free to find other sources that support the edit (and cite those sources) and redo it - however, do not include the SEO Spam hashtags in the changeset.  Also, the cafe was tagged Pizza_on_fridays=yummy - that is not a standard tag in OSM.  You also added the tag addr:street=N 2nd St, in OSM we do not generally abbreviate things, so it probably should be North 2nd Street - more stuff your instructor should have pointed out.