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

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

scripts/add_electricity.py

@@ -122,6 +122,7 @@ def calculate_annuity(n, r):
     else:
         return 1 / n
 
+
 def add_missing_carriers(n, carriers):
     """
     Function to add missing carriers to the network without raising errors.
@@ -130,6 +131,7 @@ def add_missing_carriers(n, carriers):
     if len(missing_carriers) > 0:
         n.madd("Carrier", missing_carriers)
 
+
 def sanitize_carriers(n, config):
     """
     Sanitize the carrier information in a PyPSA Network object.