Address review (cleanup tests)

Author: skirpichev

Lib/test/test_float.py

@@ -701,12 +701,14 @@ def test_format(self):
         self.assertEqual(format(-1.0, '%'), '-100.000000%')
 
         # hexadecimal format
-        self.assertEqual(format(float.fromhex('0x0.0030p+0'), 'x'), '0x1.8p-11')
-        self.assertEqual(format(float.fromhex('0x0.0040p+0'), 'x'), '0x1p-10')
-        self.assertEqual(format(float.fromhex('0x0.0040p+0'), '>10x'), '   0x1p-10')
-        self.assertEqual(format(float.fromhex('0x0.0040p+0'), '>#10x'), '  0x1.p-10')
-        self.assertEqual(format(float.fromhex('0x0.0040p+0'), '<10x'), '0x1p-10   ')
-        self.assertEqual(format(float.fromhex('0x0.0040p+0'), '<#10x'), '0x1.p-10  ')
+        x = float.fromhex('0x0.0030p+0')
+        self.assertEqual(format(x, 'x'), '0x1.8p-11')
+        x = float.fromhex('0x0.0040p+0')
+        self.assertEqual(format(x, 'x'), '0x1p-10')
+        self.assertEqual(format(x, '>10x'), '   0x1p-10')
+        self.assertEqual(format(x, '>#10x'), '  0x1.p-10')
+        self.assertEqual(format(x, '<10x'), '0x1p-10   ')
+        self.assertEqual(format(x, '<#10x'), '0x1.p-10  ')
 
         # conversion to string should fail
         self.assertRaises(ValueError, format, 3.0, "s")