Fixed #34140 -- Reformatted code blocks in docs with blacken-docs.

docs/topics/conditional-view-processing.txt

@@ -71,9 +71,11 @@ Suppose you have this pair of models, representing a small blog system::
     import datetime
     from django.db import models
 
+
     class Blog(models.Model):
         ...
 
+
     class Entry(models.Model):
         blog = models.ForeignKey(Blog, on_delete=models.CASCADE)
         published = models.DateTimeField(default=datetime.datetime.now)
@@ -92,6 +94,7 @@ for your front page view::
 
     from django.views.decorators.http import condition
 
+
     @condition(last_modified_func=latest_entry)
     def front_page(request, blog_id):
         ...
@@ -135,6 +138,8 @@ using one of these decorators::
 
     def front_page(request, blog_id):
         ...
+
+
     front_page = last_modified(latest_entry)(front_page)
 
 Use ``condition`` when testing both conditions
@@ -152,6 +157,7 @@ this would lead to incorrect behavior.
     def my_view(request):
         ...
 
+
     # End of bad code.
 
 The first decorator doesn't know anything about the second and might