The user manual
GHC's user manual contains documentation intended for users of GHC. They are not interested in how GHC works; they just want to use it.
The user manual is held in docs/user_guide, and is written in ReStructuredText format (.rst files). This allows us to typeset it as HTML pages, or as LaTeX.
See also the notes on building the documentation.
See the "Care and feeding of your GHC User's Guide" section for conventions and a basic introduction to ReST.