Refactor azure.py and test_file_utils.py for improved readability

- Adjusted formatting in `azure.py` to enhance clarity by adding space in the slicing operation.
- Reformatted the `reports_dir_path` assignment in `test_file_utils.py` for better readability with line breaks.

Author: Topi Jarvinen

src/FileUtils/storage/azure.py

@@ -625,7 +625,7 @@ def list_directory(
             for blob in container_client.list_blobs(name_starts_with=blob_prefix):
                 # Remove the prefix to get relative path
                 relative_path = (
-                    blob.name[len(blob_prefix):] if blob_prefix else blob.name
+                    blob.name[len(blob_prefix) :] if blob_prefix else blob.name
                 )
 
                 # Skip empty names

tests/unit/test_file_utils.py

@@ -228,7 +228,9 @@ def test_create_directory(file_utils):
 
     # Create directory under reports
     reports_dir = file_utils.create_directory("monthly", parent_dir="reports")
-    reports_dir_path = Path(reports_dir)  # Now returns string, convert to Path for assertions
+    reports_dir_path = Path(
+        reports_dir
+    )  # Now returns string, convert to Path for assertions
     assert reports_dir_path.exists()
     assert reports_dir_path.is_dir()
     assert reports_dir_path == file_utils.project_root / "reports" / "monthly"