Simplified dict initialization in two places.

django/db/models/expressions.py

@@ -982,8 +982,10 @@ class OrderBy(BaseExpression):
     def as_sql(self, compiler, connection):
         connection.ops.check_expression_support(self)
         expression_sql, params = compiler.compile(self.expression)
-        placeholders = {'expression': expression_sql}
-        placeholders['ordering'] = 'DESC' if self.descending else 'ASC'
+        placeholders = {
+            'expression': expression_sql,
+            'ordering': 'DESC' if self.descending else 'ASC',
+        }
         return (self.template % placeholders).rstrip(), params
 
     def get_group_by_cols(self):

django/template/context_processors.py

@@ -49,18 +49,15 @@ def debug(request):
 
 def i18n(request):
     from django.utils import translation
-
-    context_extras = {}
-    context_extras['LANGUAGES'] = settings.LANGUAGES
-    context_extras['LANGUAGE_CODE'] = translation.get_language()
-    context_extras['LANGUAGE_BIDI'] = translation.get_language_bidi()
-
-    return context_extras
+    return {
+        'LANGUAGES': settings.LANGUAGES,
+        'LANGUAGE_CODE': translation.get_language(),
+        'LANGUAGE_BIDI': translation.get_language_bidi(),
+    }
 
 
 def tz(request):
     from django.utils import timezone
-
     return {'TIME_ZONE': timezone.get_current_timezone_name()}