[css-box] Fixed example 26

[retrazil]

Example 26 has lot of errors. I've replaced ambiguous 'body' with 'content'. Also attached all the container (or boxes/ pseudo code divs) names with actual css ids and replaced pseudo code like with actual div tags.

[tabatkins]

None of these are actually wrong - it's not valid HTML, sure, but the tag structure and selectors are otherwise fine. And the 'border' declaration is correct as is.

[retrazil]

Why use pseudo code in one example while all the rest of the examples contain valid html code ? there can be easily confused with the actual html tag.

'border' declaration is correct like you say.

[frivoal]

@tabatkins This PR should be closed or accepted. Keeping it open forever does not help anyone.

@retrazil The original example isn't pseudo code, it would work in if loaded in a browser. Yes, it does use non existing elements with made up semantics, but the valid markup you suggested is more verbose, which may distracts from the point the example wants to make.