Fix missing format string qualifier (#54705)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54705
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: bdhirsh
Differential Revision: D27338808
Pulled By: ezyang
fbshipit-source-id: b21c931c2306e525bc444766bc203bb303868dbf
