In a text document, how do I join several lines into a single line? I want each paragraph to be on a single line, but keep the lines between the paragraphs.
Here is an example. I want to convert this text
Lorem ipsum dolor sit amet, consectetuer
adipiscing elit. Ut purus elit, vestibulum ut, placerat ac,
adipiscing vitae, felis.Curabitur dictum gravida mauris. Nam arcu
libero, nonummy eget, consectetuer id, vulputate a, magna. Donec
vehicula augue eu neque.
to this text
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Ut purus elit, vestibulum ut, placerat ac, adipiscing vitae, felis.
Curabitur dictum gravida mauris. Nam arcu libero, nonummy eget, consectetuer id, vulputate a, magna. Donec vehicula augue eu neque.
I know how to do it in vim or fmt, but can I do it in TextEdit and in the builtin text boxes? I don't want to manually have to do ^D<space> at the end of each line.

