[3.11] gh-93883: elide traceback indicators when possible (GH-93994)

Doc/library/traceback.rst

@@ -464,41 +464,36 @@ The output for the example would look similar to this:
    *** print_tb:
      File "<doctest...>", line 10, in <module>
        lumberjack()
-       ^^^^^^^^^^^^
    *** print_exception:
    Traceback (most recent call last):
      File "<doctest...>", line 10, in <module>
        lumberjack()
-       ^^^^^^^^^^^^
      File "<doctest...>", line 4, in lumberjack
        bright_side_of_death()
-       ^^^^^^^^^^^^^^^^^^^^^^
    IndexError: tuple index out of range
    *** print_exc:
    Traceback (most recent call last):
      File "<doctest...>", line 10, in <module>
        lumberjack()
-       ^^^^^^^^^^^^
      File "<doctest...>", line 4, in lumberjack
        bright_side_of_death()
-       ^^^^^^^^^^^^^^^^^^^^^^
    IndexError: tuple index out of range
    *** format_exc, first and last line:
    Traceback (most recent call last):
    IndexError: tuple index out of range
    *** format_exception:
    ['Traceback (most recent call last):\n',
-    '  File "<doctest default[0]>", line 10, in <module>\n    lumberjack()\n    ^^^^^^^^^^^^\n',
-    '  File "<doctest default[0]>", line 4, in lumberjack\n    bright_side_of_death()\n    ^^^^^^^^^^^^^^^^^^^^^^\n',
+    '  File "<doctest default[0]>", line 10, in <module>\n    lumberjack()\n',
+    '  File "<doctest default[0]>", line 4, in lumberjack\n    bright_side_of_death()\n',
     '  File "<doctest default[0]>", line 7, in bright_side_of_death\n    return tuple()[0]\n           ~~~~~~~^^^\n',
     'IndexError: tuple index out of range\n']
    *** extract_tb:
    [<FrameSummary file <doctest...>, line 10 in <module>>,
     <FrameSummary file <doctest...>, line 4 in lumberjack>,
     <FrameSummary file <doctest...>, line 7 in bright_side_of_death>]
    *** format_tb:
-   ['  File "<doctest default[0]>", line 10, in <module>\n    lumberjack()\n    ^^^^^^^^^^^^\n',
-    '  File "<doctest default[0]>", line 4, in lumberjack\n    bright_side_of_death()\n    ^^^^^^^^^^^^^^^^^^^^^^\n',
+   ['  File "<doctest default[0]>", line 10, in <module>\n    lumberjack()\n',
+    '  File "<doctest default[0]>", line 4, in lumberjack\n    bright_side_of_death()\n',
     '  File "<doctest default[0]>", line 7, in bright_side_of_death\n    return tuple()[0]\n           ~~~~~~~^^^\n']
    *** tb_lineno: 10
 

Doc/whatsnew/3.11.rst

@@ -117,7 +117,6 @@ when dealing with deeply nested dictionary objects and multiple function calls,
     Traceback (most recent call last):
       File "query.py", line 37, in <module>
         magic_arithmetic('foo')
-        ^^^^^^^^^^^^^^^^^^^^^^^
       File "query.py", line 18, in magic_arithmetic
         return add_counts(x) / 25
                ^^^^^^^^^^^^^

Lib/idlelib/idle_test/test_run.py

@@ -3,7 +3,7 @@
 from idlelib import run
 import io
 import sys
-from test.support import captured_output, captured_stderr, has_no_debug_ranges
+from test.support import captured_output, captured_stderr
 import unittest
 from unittest import mock
 import idlelib
@@ -33,14 +33,9 @@ def __eq__(self, other):
                         run.print_exception()
 
         tb = output.getvalue().strip().splitlines()
-        if has_no_debug_ranges():
-            self.assertEqual(11, len(tb))
-            self.assertIn('UnhashableException: ex2', tb[3])
-            self.assertIn('UnhashableException: ex1', tb[10])
-        else:
-            self.assertEqual(13, len(tb))
-            self.assertIn('UnhashableException: ex2', tb[4])
-            self.assertIn('UnhashableException: ex1', tb[12])
+        self.assertEqual(11, len(tb))
+        self.assertIn('UnhashableException: ex2', tb[3])
+        self.assertIn('UnhashableException: ex1', tb[10])
 
     data = (('1/0', ZeroDivisionError, "division by zero\n"),
             ('abc', NameError, "name 'abc' is not defined. "

Lib/test/test_cmd_line_script.py

@@ -549,10 +549,10 @@ def test_pep_409_verbiage(self):
             script_name = _make_test_script(script_dir, 'script', script)
             exitcode, stdout, stderr = assert_python_failure(script_name)
             text = stderr.decode('ascii').split('\n')
-            self.assertEqual(len(text), 6)
+            self.assertEqual(len(text), 5)
             self.assertTrue(text[0].startswith('Traceback'))
             self.assertTrue(text[1].startswith('  File '))
-            self.assertTrue(text[4].startswith('NameError'))
+            self.assertTrue(text[3].startswith('NameError'))
 
     def test_non_ascii(self):
         # Mac OS X denies the creation of a file with an invalid UTF-8 name.

Lib/test/test_doctest.py

@@ -2854,7 +2854,7 @@ def test_testmod(): r"""
     # Skip the test: the filesystem encoding is unable to encode the filename
     supports_unicode = False
 
-if supports_unicode and not support.has_no_debug_ranges():
+if supports_unicode:
     def test_unicode(): """
 Check doctest with a non-ascii filename:
 
@@ -2876,10 +2876,8 @@ def test_unicode(): """
         Traceback (most recent call last):
           File ...
             exec(compile(example.source, filename, "single",
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
           File "<doctest foo-bär@baz[0]>", line 1, in <module>
             raise Exception('clé')
-            ^^^^^^^^^^^^^^^^^^^^^^
         Exception: clé
     TestResults(failed=1, attempted=1)
     """