Refactor file:line:col to be less ugly (#22177)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22177
ghimport-source-id: e35f068c2d39bd8fa2058a9bfc0b1a3856f9383d
Test Plan: Imported from OSS
Differential Revision: D15981424
Pulled By: jamesr66a
fbshipit-source-id: b7748c5cfd4f8ea594314cb601a2b8045173700a
