Sync Python 3.14 branch from GitHub (2026-04-28)

Summary:
Imported python/cpython `3.14.4+` from upstream rev [`c181c5f`](https://www.github.com/python/cpython/commit/c181c5fa16273f0cc4d7ed20a016e0921f60fdfd) (committed 2026-04-28 13:30:12+00:00).

# Commit Info

Base: (`3.14.4`) - [`23116f9`](https://www.github.com/python/cpython/commit/23116f998f6789d8c2fbe5ed5b8146854c8c2a4f) (commit date: 2026-04-07 13:12:57+00:00)
Imported: (`3.14.4+`) - [`c181c5f`](https://www.github.com/python/cpython/commit/c181c5fa16273f0cc4d7ed20a016e0921f60fdfd) (commit date: 2026-04-28 13:30:12+00:00)

# Noteworthy file changes

- Test files (1 added, 1 removed)
- Low-signal files (40 added) (NEWS.d, docs, .github)

Complete list of added/removed files: https://www.internalfb.com/intern/everpaste/?color=0&handle=GB6y5Cik1Uo16WMHAOEbpYrHQZ8Cbr0LAAAz

Reviewed By: itamaro

Differential Revision: D102886517

fbshipit-source-id: 6727892a582074e9b64715a8719c48d8dd05bbd0

Author: DinoV

.gitattributes

@@ -34,6 +34,9 @@ Lib/test/xmltestdata/*                     noeol
 Lib/venv/scripts/common/activate text eol=lf
 Lib/venv/scripts/posix/* text eol=lf
 
+# Prevent GitHub's web conflict editor from converting LF to CRLF
+*.rst text eol=lf
+
 # CRLF files
 [attr]dos text eol=crlf
 

.github/workflows/add-issue-header.yml

@@ -12,7 +12,8 @@ on:
       # Only ever run once
       - opened
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
   add-header:

.github/workflows/build.yml

@@ -11,7 +11,8 @@ on:
     - 'main'
     - '3.*'
 
-permissions: {}
+permissions:
+  contents: read
 
 concurrency:
   # https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#concurrency
@@ -637,6 +638,7 @@ jobs:
       needs.build-context.outputs.run-ci-fuzz == 'true'
       || needs.build-context.outputs.run-ci-fuzz-stdlib == 'true'
     permissions:
+      contents: read
       security-events: write
     strategy:
       fail-fast: false

.github/workflows/jit.yml

@@ -12,7 +12,8 @@ on:
     paths: *paths
   workflow_dispatch:
 
-permissions: {}
+permissions:
+  contents: read
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}

.github/workflows/lint.yml

@@ -2,7 +2,8 @@ name: Lint
 
 on: [push, pull_request, workflow_dispatch]
 
-permissions: {}
+permissions:
+  contents: read
 
 env:
   FORCE_COLOR: 1

.github/workflows/mypy.yml

@@ -18,6 +18,7 @@ on:
       - "Tools/build/compute-changes.py"
       - "Tools/build/deepfreeze.py"
       - "Tools/build/generate-build-details.py"
+      - "Tools/build/generate_levenshtein_examples.py"
       - "Tools/build/generate_sbom.py"
       - "Tools/build/generate_stdlib_module_names.py"
       - "Tools/build/mypy.ini"
@@ -32,7 +33,8 @@ on:
       - "Tools/requirements-dev.txt"
   workflow_dispatch:
 
-permissions: {}
+permissions:
+  contents: read
 
 env:
   PIP_DISABLE_PIP_VERSION_CHECK: 1

.github/workflows/new-bugs-announce-notifier.yml

@@ -5,7 +5,8 @@ on:
     types:
       - opened
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
   notify-new-bugs-announce:

.github/workflows/require-pr-label.yml

@@ -4,7 +4,8 @@ on:
   pull_request:
     types: [opened, reopened, labeled, unlabeled, synchronize]
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
   label-dnm:

.github/workflows/reusable-cifuzz.yml

@@ -13,7 +13,8 @@ on:
         required: true
         type: string
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
   cifuzz:

.github/workflows/reusable-context.yml

@@ -54,7 +54,8 @@ on:  # yamllint disable-line rule:truthy
         description: Whether to run the Windows tests
         value: ${{ jobs.compute-changes.outputs.run-windows-tests }}  # bool
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
   compute-changes: