diff --git a/download.py b/download.py
index 6dde19f..84132b9 100644
--- a/download.py
+++ b/download.py
@@ -76,9 +76,11 @@ def get_puzzle_source(date: PuzzleDate, token: str) -> str:
 
     return res.text
 
+
 def build_cookies(token: str) -> dict[str, str]:
     return {"session": token}
 
+
 def extract_sample_inputs(puzzle_source: str) -> List[str]:
     LOG.debug("Extracting puzzle inputs from puzzle source")
     souped_puzzle_source = bs4.BeautifulSoup(puzzle_source, "html.parser")
@@ -138,7 +140,9 @@ def save_sample_inputs(sample_inputs: Iterable[str], output_dir: pathlib.Path):
     LOG.info(f"Downloaded {num_inputs} sample input(s) successfully")
 
 
-def download_sample_inputs(date: PuzzleDate, token: str, output_dir: pathlib.Path, *, interactive):
+def download_sample_inputs(
+    date: PuzzleDate, token: str, output_dir: pathlib.Path, *, interactive
+):
     inputs = find_sample_inputs(date, token)
     if interactive:
         inputs = interactively_filter_sample_inputs(inputs)
@@ -161,6 +165,7 @@ def download_input(date: PuzzleDate, token: str, output_dir: pathlib.Path):
     puzzle_input = fetch_input(date, token)
     data_to_write = ensure_ends_with(puzzle_input, os.linesep)
     path = output_dir / "input.txt"
+
     with open(path, "w") as input_file:
         input_file.write(data_to_write)
 
@@ -296,7 +301,9 @@ def main(
     try:
         step = "download sample inputs"
         if not input_only:
-            download_sample_inputs(date_to_fetch, token, output_dir, interactive=interactive)
+            download_sample_inputs(
+                date_to_fetch, token, output_dir, interactive=interactive
+            )
         step = "download input"
         download_input(date_to_fetch, token, output_dir)
     except requests.exceptions.HTTPError as err: