fix listing numbers

Author: hjwp

chapter_19_spiking_custom_auth.asciidoc

@@ -1123,7 +1123,7 @@ to hold all the files related to login:
 ----
 $ *cd src && python manage.py startapp accounts*
 ----
-//ch18l021
+//ch19l021
 
 // TODO: some output?
 // DAVID: probably a good idea to `cd ..` after this command.
@@ -1188,7 +1188,7 @@ And now let's add add a _test_models.py_ to say:
 
 
 [role="sourcecode"]
-.src/accounts/tests/test_models.py (ch18l023)
+.src/accounts/tests/test_models.py (ch19l023)
 ====
 [source,python]
 ----
@@ -1225,7 +1225,7 @@ Password?  Username?  Bah!  How about this?
 
 
 [role="sourcecode"]
-.src/accounts/models.py (ch18l025)
+.src/accounts/models.py (ch19l025)
 ====
 [source,python]
 ----
@@ -1242,7 +1242,7 @@ And we wire it up inside _settings.py_, adding `accounts` to `INSTALLED_APPS`
 and a variable called `AUTH_USER_MODEL`:
 
 [role="sourcecode"]
-.src/superlists/settings.py (ch18l026)
+.src/superlists/settings.py (ch19l026)
 ====
 [source,python]
 ----
@@ -1284,7 +1284,7 @@ so you should be able to figure out the answers to these questions for yourself.
 Here you go:
 
 [role="sourcecode"]
-.src/accounts/models.py (ch18l027)
+.src/accounts/models.py (ch19l027)
 ====
 [source,python]
 ----
@@ -1310,7 +1310,7 @@ AttributeError: type object 'User' has no attribute 'USERNAME_FIELD'
 And we go through a few more of these, until we get to:
 
 [role="sourcecode"]
-.src/accounts/models.py (ch18l029)
+.src/accounts/models.py (ch19l029)
 ====
 [source,python]
 ----
@@ -1344,7 +1344,7 @@ Well, the simple way to fix that would be like this:
 
 
 [role="sourcecode"]
-.src/accounts/models.py (ch18l030)
+.src/accounts/models.py (ch19l030)
 ====
 [source,python]
 ----
@@ -1371,7 +1371,7 @@ Migrations for 'accounts':
   src/accounts/migrations/0001_initial.py
     + Create model User
 ----
-//ch18l031
+//ch19l031
 
 
 And the test passes:
@@ -1411,7 +1411,7 @@ and conceivably claim it was "just a refactor",
 it would be better to have a specific test:
 
 [role="sourcecode"]
-.src/accounts/tests/test_models.py (ch18l032)
+.src/accounts/tests/test_models.py (ch19l032)
 ====
 [source,python]
 ----
@@ -1439,7 +1439,7 @@ TIP: Your tests can be a form of documentation for your code--they
 And here's the implementation (`primary_key` makes the `unique=True` obsolete):
 
 [role="sourcecode"]
-.src/accounts/models.py (ch18l033)
+.src/accounts/models.py (ch19l033)
 ====
 [source,python]
 ----
@@ -1459,7 +1459,7 @@ Migrations for 'accounts':
   src/accounts/migrations/0001_initial.py
     + Create model User
 ----
-//ch18l034
+//ch19l034
 
 // DAVID: Deleting migrations can get readers in a pickle if they have already run migrations locally.
 // Might be worth saying we're only doing this because we've just created it, and advise them to delete
@@ -1509,7 +1509,7 @@ should be able to link an email to a unique ID,
 and that ID shouldn't be the same two times in a row:
 
 [role="sourcecode"]
-.src/accounts/tests/test_models.py (ch18l035)
+.src/accounts/tests/test_models.py (ch19l035)
 ====
 [source,python]
 ----
@@ -1534,7 +1534,7 @@ make migrations, get new error, delete migrations,
 re-create new migrations, another code change, and so on...
 
 
-[role="dofirst-ch18l036"]
+[role="dofirst-ch19l036"]
 [subs="specialcharacters,macros"]
 ----
 $ pass:quotes[*python src/manage.py test accounts*]
@@ -1546,7 +1546,7 @@ I'll trust you to go through these conscientiously--remember,
 I may not be able to see you, but the Testing Goat can!
 
 
-[role="dofirst-ch18l037"]
+[role="dofirst-ch19l037"]
 [subs="specialcharacters,macros"]
 ----
 $ pass:quotes[*python src/manage.py makemigrations*]
@@ -1561,8 +1561,8 @@ $ pass:quotes[*rm src/accounts/migrations/0002_token.py*]
 
 Eventually you should get to this code...
 
-[role="sourcecode dofirst-ch18l038-0"]
-.src/accounts/models.py (ch18l038)
+[role="sourcecode dofirst-ch19l038-0"]
+.src/accounts/models.py (ch19l038)
 ====
 [source,python]
 ----
@@ -1575,7 +1575,7 @@ class Token(models.Model):
 
 And this error:
 
-[role="dofirst-ch18l039"]
+[role="dofirst-ch19l039"]
 [subs="specialcharacters,macros"]
 ----
 $ pass:quotes[*python src/manage.py test accounts*]
@@ -1594,7 +1594,7 @@ We can use it like this:
 // DAVID: It feels like a strange time to introduce it, seeing as we've already used it in the spike earlier.
 
 [role="sourcecode"]
-.src/accounts/models.py (ch18l040)
+.src/accounts/models.py (ch19l040)
 ====
 [source,python]
 ----
@@ -1615,7 +1615,7 @@ that should get us to passing tests:
 // but next time they make migrations it will include this change too. That doesn't matter that
 // much but isn't as clean a git history. Might be simpler just to tell them to makemigrations.
 
-[role="dofirst-ch18l041"]
+[role="dofirst-ch19l041"]
 [subs="specialcharacters,quotes"]
 ----
 $ *python src/manage.py test accounts*