The way the execution steps section is formatted recently changed,
so update the rendered test file.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

This commit adds the unit test module for the renderer.

It includes tests for the parser, renderer and relevant formatting
methods. It also adds a set of files that are used by some of these
tests.

The commit also updates the README file explaining how to execute
these tests.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>