added a space between the first name and last name in author object name

lancedamalerio_reading/bookshelf/models.py

@@ -11,7 +11,7 @@ class Author(models.Model):
     bio = models.CharField(max_length = 700)
 
     def __str__(self):
-        return self.first_name + self.last_name 
+        return self.first_name + " " + self.last_name 
 
 #Book
 #title; author; publisher; year_published; ISBN; blurb