Tweaking make_su_cmd test

Fixes #7652

test/units/TestUtils.py

@@ -512,7 +512,7 @@ class TestUtils(unittest.TestCase):
         cmd = ansible.utils.make_su_cmd('root', '/bin/sh', '/bin/ls')
         self.assertTrue(isinstance(cmd, tuple))
         self.assertEqual(len(cmd), 3)
-        self.assertTrue('root -c "/bin/sh' in cmd[0])
+        self.assertTrue('root -c "/bin/sh' in cmd[0] or ' root -c /bin/sh' in cmd[0])
         self.assertTrue(re.compile(cmd[1]))
         self.assertTrue('echo SUDO-SUCCESS-' in cmd[0] and cmd[2].startswith('SUDO-SUCCESS-'))