ci: Add ruff-format check

- Add CI step
- Fix errors

.github/workflows/linux.yml

@@ -26,7 +26,7 @@ jobs:
           python-version: '3.12'
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade meson PyYAML
+          python -m pip install --upgrade meson PyYAML ruff
           sudo apt update
           sudo apt install -y \
             doxygen libxcb-xkb-dev valgrind ninja-build \
@@ -81,3 +81,6 @@ jobs:
           name: doxygen-docs
           path: |
             build/html/
+      - name: Ruff format
+        run:
+          ruff format --line-length=88 --check --diff .

scripts/perfect_hash.py

@@ -75,6 +75,7 @@
 with a new graph, and thereby discarding the vertex values from the failed
 attempt.
 """
+
 from __future__ import absolute_import, division, print_function
 
 import sys

test/symbols-leak-test.py

@@ -4,6 +4,7 @@
 If this fails, please update the appropriate .map file (adding new version
 nodes as needed).
 """
+
 import os
 import pathlib
 import re