Bump ruff version, resolve 2024.2 style lint

noxfile.py

@@ -86,6 +86,6 @@ def docs(session):
 def ruff(session):
     """Check code for linter warnings and formatting issues."""
     check_files = ['src', 'tests', 'doc', 'noxfile.py']
-    session.install('ruff ~= 0.1.9')
+    session.install('ruff ~= 0.3')
     session.run('ruff', 'check', *check_files)
     session.run('ruff', 'format', '--diff', *check_files)

tests/test_build.py

 """
 Test the construction and behaviour of simulation contexts.
 """
+
 import copy
 import logging
 import numpy as np