Fix the construction of subprocess.CalledProcessError in test_venv (GH-10400)

The constructor of subprocess.CalledProcessError in the check_output function had an extra None in it.

Author: pablogsal

Lib/test/test_venv.py

@@ -35,7 +35,7 @@ def check_output(cmd, encoding=None):
     out, err = p.communicate()
     if p.returncode:
         raise subprocess.CalledProcessError(
-            p.returncode, cmd, None, out, err)
+            p.returncode, cmd, out, err)
     return out, err
 
 class BaseTest(unittest.TestCase):