reintroduce 56 test count

Author: hjwp

chapter_19_mocking.asciidoc

@@ -2146,12 +2146,12 @@ OK
 $ pass:quotes[*cd src && python manage.py test*]
 [...]
 
+Ran 56 tests in 78.124s
+
 OK
 ----
 //54
 
-// TODO: Ran 57 tests in 78.124s
-
 WARNING: We're nowhere near a truly secure or acceptable login system here.
     Since this is just an example app for a book, we'll leave it at that,
     but in "real life" you'd want to explore a lot more security