`transmute_ref` doc example fails to compile as-written

[jswrenn]

This hidden type alias in the doctest for transmute_ref!

/// # type u16 = zerocopy::byteorder::native_endian::U16;
/// # type u32 = zerocopy::byteorder::native_endian::U32;

exceeds the threshold of sensible cleverness by suggesting that transmute_ref somehow bypasses the usual shortcomings of alignedness and IntoBytes. Whatever example is used here should basically compile as-written.