This page shows how Markdown paragraphs are displayed. Each paragraph is separated by a blank line. DevSite recommends that every line in a paragraph is as close to the 80-character limit without overflowing, like this one is.
All lines of text not separated by a blank line are considered a single paragraph (regardless of the length of the lines) and are joined together in the rendered output, like this one is.
Here is another paragraph. There are a couple more after this one as well.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Tellus elementum sagittis vitae et leo. Ornare aenean euismod elementum nisi quis eleifend quam adipiscing vitae.
Blandit turpis cursus in hac habitasse platea dictumst. Sit amet volutpat consequat mauris nunc congue nisi. Tempor orci dapibus ultrices in iaculis nunc sed augue. Tincidunt lobortis feugiat vivamus at augue eget arcu dictum.