http://magma.ua4vjlx72wv5crhkificaeysp62hizhazipfshsdvs6jxqvhtkpllcad.onion/guide/contribute.html
If your change only affects the contents of a
single page (as will most often be the case), you can do this by simply
clicking the Help us improve this page! link at the button of the page
(see Editing files in another user's repository for details). For more complex changes (styling, multiple pages, new pages, fixing build
problems), you should first fork the repository and
then submit a pull request.