func CompactPrintCommit(c *pfs.Commit) string {
	return fmt.Sprintf("%s@%s", c.Repo.Name, c.ID)
}
func CompactPrintCommit(c *pfs.Commit) string {
	return fmt.Sprintf("%s@%s", c.Repo.Name, c.ID)
}
// CompactPrintCommit renders 'c' as a compact string, e.g.
// "myrepo@123abc:/my/file"