Convert the path to a string before streaming
Convert the path to a string before streaming

The bfs::path I/O operators work with quoted strings which is
unnecessary in a line-based format.

Kitware/sprokit,linus-sherrill/sprokit,Kitware/sprokit,mathstuf/sprokit,mathstuf/sprokit,mathstuf/sprokit,Kitware/sprokit,Kitware/sprokit,mathstuf/sprokit,linus-sherrill/sprokit,linus-sherrill/sprokit,linus-sherrill/sprokit