comment UT case

weed/storage/volume_vacuum_test.go

@@ -34,13 +34,13 @@ preparing test prerequisite easier )
 9. Now you should get updated file A,B,C
 */
 
-/*
 func TestMakeDiff(t *testing.T) {
 
 	v := new(Volume)
 	//lastCompactIndexOffset value is the index file size before step 4
 	v.lastCompactIndexOffset = 96
 	v.SuperBlock.version = 0x2
+	/*
 		err := v.makeupDiff(
 			"/yourpath/1.cpd",
 			"/yourpath/1.cpx",
@@ -51,5 +51,5 @@ func TestMakeDiff(t *testing.T) {
 		} else {
 			t.Log("makeupDiff Succeeded")
 		}
-}
 	*/
+}