assert: reverse diff direction
The current direction for the assert diffs is rather peculiar. While it’s not the “wrong” way to do it per-se, it’s definitely inconsistent with the ecosystem and is rather unintuitive.
This PR aims to fix that by reversing the direction.
Fixes: https://github.com/nodejs/node/issues/20897
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
/cc @BridgeAR @addaleax @targos