Make check-doxygen.sh output more interpretable. (#20362)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20362
ghimport-source-id: ac791884dc6d3954f69d8fc997b2b561f435e0e7
Differential Revision: D15375139
Pulled By: ezyang
fbshipit-source-id: c8aa0f991430269090e068f828810bae7aa39a07
