Revert "Improve readability of the extra message errors in assertEqual (#87202)"
This reverts commit 56c28ee32a78eb6f32a533d8fd64278cb9063016.
Reverted https://github.com/pytorch/pytorch/pull/87202 on behalf of https://github.com/malfet due to broke test_testing, see https://hud.pytorch.org/pytorch/pytorch/commit/56c28ee32a78eb6f32a533d8fd64278cb9063016
