When the root path of a DirIterator ends with '/', we don't need to
add another '/' before appending the file name.
Fixes an issue where files found by Assistant had 2 leading slashes.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
