fixed and passing tests

rowers/models.py

@@ -2730,7 +2730,7 @@ class Workout(models.Model):
 
     def save(self, *args, **kwargs):
         user = self.user
-        if len(self.notes)>1000:
+        if self.notes is not None and len(self.notes)>1000:
             self.notes = notes[0:950]
         if not can_add_workout(user.user):
             raise forms.ValidationError("Free Coach User cannot have any workouts")