My forum post displays as one long line. How do I avoid this?

My forum post displays in one long line that doesn’t wrap. How do I avoid this?

This problem can happen when you compose text in Google Docs, and copy/paste it into the Forum. After you paste, things look fine until you click Post… and then your text displays in one long line, as shown below. (And replies to your post will have a similar problem -- even if the person replying didn’t copy/paste from Google Docs.)

To avoid this on future posts:

In Sakai, use the Paste as plain text button when pasting text copied from Google Docs.