Equal diff prints uints in hex format

`Equal` and `EqualValues` print uints in hex format when showing diff. It would be much more useful to see `1701`, instead of `0x6a5`.

```
Error Trace:    equality_test:34
        Error:          Not equal:
                        expected: float64(1700)
                        received: uint(0x6a5)
        Messages:       Expecting prices to be equal
```