Update test cases

Author: srinivasreddy

Lib/test/test_bytes.py

@@ -460,7 +460,7 @@ def test_fromhex(self):
         self.assertRaises(ValueError, self.type2test.fromhex, '12   \x00   34')
 
         # For odd number of character(s)
-        for value in ("a", "a ", " a"," a ", "aaa", "aaa ", " aaa", " aaa "):
+        for value in ("a", "aaa", "deadbee"):
             with self.assertRaises(ValueError) as cm:
                 self.type2test.fromhex(value)
             self.assertIn("fromhex() arg must contain an even number of hexadecimal digits", str(cm.exception))