refactor: move repr fill value generation to custom class

django/template/defaultfilters.py

@@ -3,7 +3,6 @@
 import random as random_module
 import re
 import types
-from collections.abc import Sized
 from decimal import ROUND_HALF_UP, Context, Decimal, InvalidOperation, getcontext
 from functools import wraps
 from inspect import unwrap
@@ -978,9 +977,6 @@ def pprint(value):
     repr_instance = DebugRepr(limit=EXCEPTION_PRINT_LIMIT)
 
     try:
-        if isinstance(value, Sized) and len(value) > EXCEPTION_PRINT_LIMIT:
-            diff = len(value) - EXCEPTION_PRINT_LIMIT
-            repr_instance.fillvalue = "...<trimmed %d bytes string>" % diff
         value = repr_instance.repr(value)
 
     except Exception as e:

django/utils/text.py

@@ -4,6 +4,7 @@ import re
 import reprlib
 import secrets
 import unicodedata
+from collections.abc import Sized
 from gzip import GzipFile
 from gzip import compress as gzip_compress
 from io import BytesIO
@@ -502,6 +503,12 @@ class DebugRepr(reprlib.Repr):
             return s[: self.maxother] + self.gen_trim_msg(len(s))
         return s
 
+    def print(self, value):
+        if isinstance(value, Sized) and len(value) > self.limit:
+            length = len(value)
+            self.fillvalue = self.gen_trim_msg(length)
+        return self.repr(value)
+
     def gen_trim_msg(self, length):
         if length <= self.limit:
             return ""