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 here:

Also, any replies to your post will have a similar problem -- even if the person replying didn’t copy/paste from Google.

To avoid this on future posts:

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