Fixed #30463 -- Fixed crash of deprecation message when Meta.ordering contains expressions.

Regression in 1b1f64ee5a.

tests/ordering/models.py

@@ -14,6 +14,7 @@ undefined -- not random, just undefined.
 """
 
 from django.db import models
+from django.db.models.expressions import OrderBy
 
 
 class Author(models.Model):
@@ -30,7 +31,12 @@ class Article(models.Model):
     pub_date = models.DateTimeField()
 
     class Meta:
-        ordering = ('-pub_date', 'headline')
+        ordering = (
+            '-pub_date',
+            'headline',
+            models.F('author__name').asc(),
+            OrderBy(models.F('second_author__name')),
+        )
 
     def __str__(self):
         return self.headline