The header is separated from the body by a blank line.

There are blank lines at the bottom of the form to accommodate this.

Page numbers have been left in, but each separated by a blank line from the surrounding material.

There must be a blank line at the end.

For extra clarity, blank lines may also be inserted between the two parts.

There was a click, and the buzz of a blank line.

Maybe blank lines make them feel more at home.

A blank line is appended to the end of each message.

The rest of the time they'll be deleted, leaving only a blank line.

He took a paper from another stack, wrote a number on a blank line.