Documenting Allen
This documentation is written in reStructuredText and built in to web pages by Sphinx. The source can be found in the doc directory of the Allen project.
Building the documentation locally
It is enough to run the following command to get the documentation in Allen/doc/_build/html
lb-run --nightly lhcb-head/latest Allen/HEAD make -C doc html
lb-run --nightly lhcb-head/latest Allen/HEAD make -C doc linkcheck