strict Pep8 character check

Author: mbasil09

intermine/lists/listmanager.py

@@ -266,9 +266,10 @@ def create_list(
         if name is None:
             name = self.get_unused_list_name()
         if len(content) <= 0:
-            print("Lists must have one or more elements - the current list has 0")
-            print(
-                "Please create a valid list with at least one element and create the list again")
+            print("Lists must have one or more elements"
+                  " - the current list has 0")
+            print("Please create a valid list with at least one "
+                  "element and create the list again.")
             return
 
         item_content = content