rollback some change and add test

Author: Locked-chess-official

Lib/test/test_traceback.py

@@ -5189,6 +5189,15 @@ def test_no_site_package_flavour(self):
              b"or to enable your virtual environment?"), stderr
         )
 
+        code = """import abs"""
+        _, _, stderr = assert_python_failure('-S', '-c', code)
+        self.assertIn(b"Did you mean: 'abc'?", stderr)
+        self.assertIn(
+            (b"Site initialization is disabled, did you forget to "
+             b"add the site-packages directory to sys.path "
+             b"or to enable your virtual environment?"), stderr
+        )
+
     def test_missing_stdlib_module(self):
         code = """
             import sys

Lib/traceback.py

@@ -13,7 +13,6 @@
 import tokenize
 import io
 import importlib.util
-from importlib.machinery import ModuleSpec
 import pathlib
 import _colorize
 
@@ -1763,10 +1762,7 @@ def _compute_suggestion_error(exc_value, tb, wrong_name):
             d = []
             for finder in sys.meta_path:
                 if discover := getattr(finder, 'discover', None):
-                    try:
-                        d += [spec.name for spec in discover(parent) if isinstance(spec, ModuleSpec)]
-                    except Exception:
-                        continue
+                    d += [spec.name for spec in discover(parent)]
         except Exception:
             return None
     elif isinstance(exc_value, ImportError):