Система контроля версий GitLab использует язык форматирования GitHub Flavored Markdown (форматирование текста в Issues (топики). Краткое руководство: https://gitlab.igrnt.info/bible/igrnt/wikis/gitlab-markdown

Merge requests are a place to propose changes you've made to a project and discuss those changes with others

Interested parties can even contribute by pushing commits if they want to.