fix tree output sorting consistency using sort by "version"

Author: hjwp

chapter_01.asciidoc

@@ -170,16 +170,18 @@ and a subfolder called _superlists_, with more stuff inside it:
 ├── geckodriver.log
 ├── manage.py
 └── superlists
-    ├── asgi.py
     ├── __init__.py
+    ├── asgi.py
     ├── settings.py
     ├── urls.py
     └── wsgi.py
 ----
 
-NOTE: Make sure your project folder looks exactly like this!  If you
-    see two nested folders called superlists, it's because you forgot the "."
-    above.  Delete them and try again, or there will be lots of confusion
+NOTE: Make sure your project folder looks exactly like this!
+    If you see two nested folders called superlists,
+    it's because you forgot the "." above.
+    Delete them and try again,
+    or there will be lots of confusion
     with paths and working directories...
 
 The _superlists_ folder is intended for stuff that applies to the whole project--like _settings.py_,

chapter_unit_test_first_view.asciidoc

@@ -65,19 +65,19 @@ like models, views, and, of immediate interest to us, tests:
 ├── db.sqlite3
 ├── functional_tests.py
 ├── lists
+│   ├── __init__.py
 │   ├── admin.py
 │   ├── apps.py
-│   ├── __init__.py
 │   ├── migrations
 │   │   └── __init__.py
 │   ├── models.py
 │   ├── tests.py
 │   └── views.py
 ├── manage.py
 └── superlists
-    ├── asgi.py
     ├── __init__.py
     ├── __pycache__
+    ├── asgi.py
     ├── settings.py
     ├── urls.py
     └── wsgi.py

tests/book_tester.py

@@ -569,9 +569,8 @@ def replace_command_with_check(self, pos, old, new):
         self.listings[pos] = new_listing
 
 
-
     def assert_directory_tree_correct(self, expected_tree, cwd=None):
-        actual_tree = self.sourcetree.run_command('tree -I *.pyc --noreport', cwd)
+        actual_tree = self.sourcetree.run_command('tree -v -I *.pyc --noreport', cwd)
         self.assert_console_output_correct(actual_tree, expected_tree)
 
 

tests/test_chapter_01.py

@@ -33,7 +33,6 @@ def test_listings_and_commands_and_output(self):
 
         # sanity checks
         self.assertEqual(type(self.listings[0]), CodeListing)
-        # self.assertEqual(self.listings[1].skip, True)
 
         self.skip_with_check(6, 'Performing system checks...') # after runserver
         self.listings[8] = Output(str(self.listings[8]).replace('$', ''))
@@ -47,7 +46,6 @@ def test_listings_and_commands_and_output(self):
             print(self.pos)
             self.recognise_listing_and_process_it()
 
-
         self.assert_all_listings_checked(self.listings)
 
         # manually add repo, we didn't do it at the beginning