Use --delta=0 by default for tools/test_history.py (#52877)
Summary:
This is less surprising than the current default, `--delta=12`.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52877
Test Plan: Run the example commands from `tools/test_history --help` and check that their output matches that shown.
Reviewed By: pritamdamania87
Differential Revision: D26674258
Pulled By: samestep
fbshipit-source-id: 1413e11519854b0a47e14af2f1d20c57f145dacd
