style: format code with Autopep8, Black, ClangFormat, dotnet-format, …

…Go fmt, Gofumpt, Google Java Format, isort, Ktlint, PHP CS Fixer, Prettier, RuboCop, Ruff Formatter, Rustfmt, Scalafmt, StandardJS, StandardRB, swift-format and Yapf

This commit fixes the style issues introduced in d504395 according to the output
from Autopep8, Black, ClangFormat, dotnet-format, Go fmt, Gofumpt, Google Java
Format, isort, Ktlint, PHP CS Fixer, Prettier, RuboCop, Ruff Formatter, Rustfmt,
Scalafmt, StandardJS, StandardRB, swift-format and Yapf.

Details: None

transaction_processing/transaction_processing.py

@@ -1,5 +1,6 @@
 import time
 
+
 class TransactionProcessor:
     def __init__(self, transaction_validator, transaction_router):
         self.transaction_validator = transaction_validator
@@ -8,11 +9,11 @@ def __init__(self, transaction_validator, transaction_router):
     def process_transaction(self, transaction):
         errors = self.transaction_validator.validate_transaction(transaction)
         if errors:
-            print('Transaction errors:', errors)
+            print("Transaction errors:", errors)
             return False
         else:
             channel = self.transaction_router.route_transaction(transaction)
-            print('Transaction routed to:', channel)
+            print("Transaction routed to:", channel)
             time.sleep(1)
-            print('Transaction processed successfully.')
+            print("Transaction processed successfully.")
             return True