fix(doc): format bootstrap example

[roiLeo]

Fix indentation in documentation

[shinenelson]

Thank you @roiLeo for attempting this change. However, this change is not valid.

The {% highlight %} block invokes rouge. It is indentation-aware unlike HTML which is not. Hence, the rendering of indented blocks within the {% highlight %} block would be rendered indented as in the code. This is why the {% highlight %} blocks are not intended as with the rest of the HTML in the document.