std.testing: Improve expectEqualBytes for large inputs and make expectEqualSlices use it
`expectEqualBytes` will now truncate the hexdump of each input to a maximum window of 256 bytes, which makes it safe to use for arbitrarily large inputs. Therefore, it can be used in `expectEqualSlices` when the type is u8.
c37afa2811Ryan Liptak committed on 12/1/2022, 7:18:51 AM· committed by Andrew Kelleyparenta943422