-@need 1250
-In GNU Emacs version 20, and in earlier versions, you will see only
-one line of error message; it will appear in the echo area and look
-like this:
+It is possible to prevent Emacs entering the debugger in cases like
+this. We do not explain how to do that here, but we will mention what
+the result looks like, because you may encounter a similar situation
+if there is a bug in some Emacs code that you are using. In such
+cases, you will see only one line of error message; it will appear in
+the echo area and look like this: