Changes to the final HTML document

[Ndot]

Without being to opinionated on taste it adds the following:

• padding on code blocks (for better readability)
• center and restrict "id=content" element to a comfortable read size
• images are set to "width: 100%" to fit properly
• "margin: 1em 0" on table elements to prevent the scroll bar from overlapping the table last row
• small border radius on elements with background, like images and code blocks (this one is a bit opinionated, but I argue those sharp corner could be dangerous)

Here's an image to see the differences: