[update-checkout] finalize using utf-8 encoding in all subprocess invocations

Author: charles-zablit

utils/update_checkout/tests/scheme_mock.py

@@ -94,6 +94,7 @@ def __str__(self):
 
 def call_quietly(*args, **kwargs):
     kwargs["stderr"] = subprocess.STDOUT
+    kwargs["encoding"] = "utf-8"
     try:
         return subprocess.check_output(*args, **kwargs)
     except subprocess.CalledProcessError as e:

utils/update_checkout/tests/test_clone.py

@@ -54,7 +54,7 @@ def test_clone_with_additional_scheme(self):
         )
 
         # Test that we're actually checking out the 'extra' scheme based on the output
-        self.assertIn("git checkout refs/heads/main", output.decode("utf-8"))
+        self.assertIn("git checkout refs/heads/main", output)
 
 
 class SchemeWithMissingRepoTestCase(scheme_mock.SchemeMockTestCase):