fix code formatting

Author: Xronophobe

chapter_15_advanced_forms.asciidoc

@@ -96,10 +96,10 @@ items in the same list raise an error:
 [source,python]
 ----
 def test_duplicate_items_are_invalid(self):
-    list_ = List.objects.create()
-    Item.objects.create(list=list_, text='bla')
+    mylist = List.objects.create()
+    Item.objects.create(list=mylist, text="bla")
     with self.assertRaises(ValidationError):
-        item = Item(list=list_, text='bla')
+        item = Item(list=mylist, text="bla")
         item.full_clean()
 ----
 ====
@@ -116,8 +116,8 @@ overdo it on our integrity constraints:
 def test_CAN_save_same_item_to_different_lists(self):
     list1 = List.objects.create()
     list2 = List.objects.create()
-    Item.objects.create(list=list1, text='bla')
-    item = Item(list=list2, text='bla')
+    Item.objects.create(list=list1, text="bla")
+    item = Item(list=list2, text="bla")
     item.full_clean()  # should not raise
 ----
 ====
@@ -218,11 +218,11 @@ together:
 [source,python]
 ----
 class Item(models.Model):
-    text = models.TextField(default='')
+    text = models.TextField(default="")
     list = models.ForeignKey(List, default=None, on_delete=models.CASCADE)
 
     class Meta:
-        unique_together = ('list', 'text')
+        unique_together = ("list", "text")
 ----
 ====
 
@@ -370,10 +370,10 @@ Now if we change our duplicates test to do a `.save` instead of a
 [source,python]
 ----
     def test_duplicate_items_are_invalid(self):
-        list_ = List.objects.create()
-        Item.objects.create(list=list_, text='bla')
+        mylist = List.objects.create()
+        Item.objects.create(list=mylist, text="bla")
         with self.assertRaises(ValidationError):
-            item = Item(list=list_, text='bla')
+            item = Item(list=mylist, text="bla")
             # item.full_clean()
             item.save()
 ----
@@ -451,18 +451,17 @@ class ListViewTest(TestCase):
     def test_for_invalid_input_shows_error_on_page(self):
         [...]
 
-
     def test_duplicate_item_validation_errors_end_up_on_lists_page(self):
         list1 = List.objects.create()
-        item1 = Item.objects.create(list=list1, text='textey')
+        Item.objects.create(list=list1, text="textey")
         response = self.client.post(
-            f'/lists/{list1.id}/',
-            data={'text': 'textey'}
+            f"/lists/{list1.id}/",
+            data={"text": "textey"},
         )
 
         expected_error = escape("You've already got this in your list")
         self.assertContains(response, expected_error)
-        self.assertTemplateUsed(response, 'list.html')
+        self.assertTemplateUsed(response, "list.html")
         self.assertEqual(Item.objects.all().count(), 1)
 ----
 ====
@@ -610,12 +609,11 @@ class ExistingListItemForm(ItemForm):
         super().__init__(*args, **kwargs)
         self.instance.list = for_list
 
-
     def validate_unique(self):
         try:
             self.instance.validate_unique()
         except ValidationError as e:
-            e.error_dict = {'text': [DUPLICATE_ITEM_ERROR]}
+            e.error_dict = {"text": [DUPLICATE_ITEM_ERROR]}
             self._update_errors(e)
 ----
 ====
@@ -645,13 +643,15 @@ let's see if we can put this form to work in our view.
 We remove the skip, and while we're at it, we can use our new constant. Tidy.
 
 [role="sourcecode"]
-.src/lists/tests/test_views.py (ch13l049)
+.src/lists/tests/test_views.py (ch15l014)
 ====
 [source,python]
 ----
 from lists.forms import (
-    DUPLICATE_ITEM_ERROR, EMPTY_ITEM_ERROR,
-    ExistingListItemForm, ItemForm,
+    DUPLICATE_ITEM_ERROR,
+    EMPTY_ITEM_ERROR,
+    ExistingListItemForm,
+    ItemForm,
 )
 [...]
 
@@ -804,32 +804,37 @@ use Django instead, it seems like we need to bring back our custom
 ====
 [source,diff]
 ----
-@@ -13,13 -14,26 +14,26 @@@
-  <div class="col-lg-6 text-center">
-      <h1 class="display-1 mb-4">{% block header_text %}{% endblock %}</h1>
--     <form method="POST" action="{% block form_action %}{% endblock %}">
--         {{ form.text }}
-+     <form
-+         class="was-validated"  <1>
-+         method="POST"
-+         action="{% block form_action %}{% endblock %}"
-+     >
-          {% csrf_token %}
-+         <input
-+             id="id_text"
-+             name="text"
-+             class="form-control form-control-lg {% if form.errors %}is-invalid{% endif %}"  <2>
-+             placeholder="Enter a to-do item"
-+             value="{{ form.text.value }}"
-+             aria-describedby="id_text_feedback"
-+             required
-+         />
-          {% if form.errors %}
--             <div class="invalid-feedback">{{ form.errors.text }}</div>
-+             <div class="invalid-feedback">{{ form.errors.text.0 }}</div>  <3>
-          {% endif %}
-      </form>
-  </div>
+@@ -14,12 +14,25 @@
+       <div class="row justify-content-center p-5 bg-body-tertiary rounded-3">
+         <div class="col-lg-6 text-center">
+           <h1 class="display-1 mb-4">{% block header_text %}{% endblock %}</h1>
+-
+-          <form method="POST" action="{% block form_action %}{% endblock %}" >
+-            {{ form.text }}
+-            {% csrf_token %}
++          <form
++              class="was-validated"
++              method="POST"
++              action="{% block form_action %}{% endblock %}"
++          >
++              {% csrf_token %}
++              <input
++                  id="id_text"
++                  name="text"
++                  class="form-control
++                         form-control-lg
++                         {% if form.errors %}is-invalid{% endif %}"
++                  placeholder="Enter a to-do item"
++                  value="{{ form.text.value }}"
++                  aria-describedby="id_text_feedback"
++                  required
++              />
+             {% if form.errors %}
+-              <div class="invalid-feedback">{{ form.errors.text }}</div>
++              <div class="invalid-feedback">{{ form.errors.text.0 }}</div>
+             {% endif %}
+           </form>
+         </div>
 ----
 ====