Regression caused by [0]. Passing "Span" by value caused io_ply test to
fail. References were used so changes would be applied to arguments
passed in.
Revert these changes for "ply_import.cc".
[0]: d338261c55
Regression caused by [0]. Passing "Span" by value caused io_ply test to
fail. References were used so changes would be applied to arguments
passed in.
Revert these changes for "ply_import.cc".
[0]: d338261c55