Use paragraphs in a document with a root element and doctype.

Source

<!DOCTYPE html>

<html>
   The World Wide Web's markup language has always been HTML.                   HTML was primarily designed as a language for semantically describing scientific documents, although its general design and adaptations over the years have enabled it to be used to describe a number of other types of documents.

  The main area that has not been adequately addressed by HTML is a vague subject referred to as Web Applications. This specification attempts to rectify this, while at the same time updating the HTML specifications to address issues raised in the past few years.
</html>

Result

The World Wide Web's markup language has always been HTML. HTML was primarily designed as a language for semantically describing scientific documents, although its general design and adaptations over the years have enabled it to be used to describe a number of other types of documents. The main area that has not been adequately addressed by HTML is a vague subject referred to as Web Applications. This specification attempts to rectify this, while at the same time updating the HTML specifications to address issues raised in the past few years.

Discussion

Whitespace formatting is ignored in HTML5, such as the indentation and paragraphing in the above solution. Indentation can be added with elements such as paragraph <p> and unordered list <ul>.