+# DOCUMENTATION FORMAT
+
+The format of the documentation is a dialect of [markdown] that allows GitHub fences (`~~~`).
+
+Code blocks are interpreted as snippets of Nit programs and intended to be used as examples of code.
+When these code snippets are valid, executable and contain at least and `assert` clause, they could be automatically executed and verified.
+See `nitunit(1)` for details.
+
+ [markdown]: http://daringfireball.net/projects/markdown
+
+# OPTIONS