Refactor: apply pyformat for coding style consistency

add pyformat for presubmit hook

Flag: EXEMPT mainline
Bug: 419423721
Test: atest CtsConnectivityMultiDevicesTestCases
Change-Id: I9abc5cee454e8c8e21ce7e3c134145857680251f

staticlibs/testutils/host/python/assert_utils.py

@@ -19,9 +19,11 @@ from typing import Callable
 class UnexpectedBehaviorError(Exception):
   """Raised when there is an unexpected behavior during applying a procedure."""
 
+
 class UnexpectedExceptionError(Exception):
   """Raised when there is an unexpected exception throws during applying a procedure"""
 
+
 def expect_with_retry(
     predicate: Callable[[], bool],
     retry_action: Callable[[], None] = None,
@@ -41,19 +43,20 @@ def expect_with_retry(
       time.sleep(retry_interval_sec)
 
   raise UnexpectedBehaviorError(
-      "Predicate didn't become true after " + str(max_retries) + " retries."
+      "Predicate didn't become true after " + str(max_retries) + ' retries.'
   )
 
+
 def expect_throws(runnable: callable, exception_class) -> None:
   try:
     runnable()
-    raise UnexpectedBehaviorError("Expected an exception, but none was thrown")
+    raise UnexpectedBehaviorError('Expected an exception, but none was thrown')
   except exception_class:
     pass
   except UnexpectedBehaviorError as e:
     raise e
   except Exception as e:
-      raise UnexpectedExceptionError(
-        f"Expected exception of type {exception_class.__name__}, "
-        f"but got {type(e).__name__}: {e}"
-      )
+    raise UnexpectedExceptionError(
+        f'Expected exception of type {exception_class.__name__}, '
+        f'but got {type(e).__name__}: {e}'
+    )