[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

Snakefile

@@ -339,6 +339,7 @@ if config["pypsa-de"]["retrieve_ariadne_database"]:
         script:
             "scripts/pypsa-de/retrieve_ariadne_database.py"
 
+
 def get_ariadne_database(w):
     if config["pypsa-de"]["retrieve_ariadne_database"]:
         return "data/ariadne_database.csv"