This simplifies parsing when using these rules from scripts.
This is a backport of [[https://github.com/bitcoin/bitcoin/pull/21304 | core#21304]]
https://github.com/bitcoin/bitcoin/pull/21304/commits/84912d4b24382ae022da3a863bd6caa2b8948d94
I was wondering why I had to add this space to find the SDK, when I initially tested guix.