Code from `sebastian/diff` has been forked and republished by permission of Sebastian Bergmann.
Licenced with BSD-3-Clause @ see LICENSE_DIFF, copyright (c) Sebastian Bergmann <sebastian@phpunit.de>

Code from `GeckoPackages/GeckoDiffOutputBuilder` has been copied and republished by permission of GeckoPackages.
Licenced with MIT @ see LICENSE_GECKO, copyright (c) GeckoPackages https://github.com/GeckoPackages