Closes #14452: brought tests in line with removal of BOM insertion code.

Lib/test/test_logging.py

@@ -1480,17 +1480,17 @@ class SysLogHandlerTest(BaseTest):
         logger = logging.getLogger("slh")
         logger.error("sp\xe4m")
         self.handled.wait()
-        self.assertEqual(self.log_output, b'<11>\xef\xbb\xbfsp\xc3\xa4m\x00')
+        self.assertEqual(self.log_output, b'<11>sp\xc3\xa4m\x00')
         self.handled.clear()
         self.sl_hdlr.append_nul = False
         logger.error("sp\xe4m")
         self.handled.wait()
-        self.assertEqual(self.log_output, b'<11>\xef\xbb\xbfsp\xc3\xa4m')
+        self.assertEqual(self.log_output, b'<11>sp\xc3\xa4m')
         self.handled.clear()
         self.sl_hdlr.ident = "h\xe4m-"
         logger.error("sp\xe4m")
         self.handled.wait()
-        self.assertEqual(self.log_output, b'<11>\xef\xbb\xbfh\xc3\xa4m-sp\xc3\xa4m')
+        self.assertEqual(self.log_output, b'<11>h\xc3\xa4m-sp\xc3\xa4m')
 
 
 @unittest.skipUnless(threading, 'Threading required for this test.')