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cfe2709e - fix ruff rule E226: add missing whitespace around operator in f-strings (#144415)

fix ruff rule E226: add missing whitespace around operator in f-strings (#144415) Summary: The fixes are generated by: ```bash ruff check --fix --preview --unsafe-fixes --select=E226 . lintrunner -a --take "RUFF,PYFMT" --all-files ``` X-link: https://github.com/pytorch/pytorch/pull/144415 Approved by: https://github.com/huydhn, https://github.com/Skylion007 Reviewed By: clee2000 Differential Revision: D67957574 fbshipit-source-id: 176af7b581aa8686d72a533af9cfe91a7728ac75