execute-callback in drscheme:unit:frame

This method is called when the user clicks on the Run button or chooses the Run menu item.

• (send a-drscheme:unit:frame execute-callback) -> void

  It calls ensure-rep-shown and then it calls do-many-text-evals passing in the result of get-interactions-text and its entire range, unless the first two characters are "#!" in which case, it skips the first line.