style: pre-commit fixes

scripts/update_version.py

@@ -24,7 +24,9 @@ def update_version():
     )
 
     # pybamm/version.py
-    with open(os.path.join(pybamm.root_dir(), "src", "pybamm", "version.py"), "r+") as file:
+    with open(
+        os.path.join(pybamm.root_dir(), "src", "pybamm", "version.py"), "r+"
+    ) as file:
         output = file.read()
         replace_version = re.sub(
             '(?<=__version__ = ")(.+)(?=")', release_version, output

src/pybamm/citations.py

@@ -68,7 +68,9 @@ def read_citations(self):
         """
         try:
             parse_file = import_optional_dependency("pybtex.database", "parse_file")
-            citations_file = os.path.join(pybamm.root_dir(), "src", "pybamm", "CITATIONS.bib")
+            citations_file = os.path.join(
+                pybamm.root_dir(), "src", "pybamm", "CITATIONS.bib"
+            )
             bib_data = parse_file(citations_file, bib_format="bibtex")
             for key, entry in bib_data.entries.items():
                 self._add_citation(key, entry)