-B<NOTE>: To match all opening curly braces, and no other opening tokens, please
-prefix the brace it with an asterisk, like this: '*{'. Otherwise a warning
-message will occur. This is necessary to avoid problems while the input scheme
-is being updated and generalized. A single bare curly brace previously matched
-all container tokens, and tentatively still does. Likewise, to match all
-closing curly braces, and no other closing tokens, use '*}'.
+B<NOTE>: A request to break before an opening container, such as B<-kbb='('>,
+will be silently ignored because it can lead to formatting instability.
+Likewise, a request to break after a closing container, such as B<-kba>=')',
+will also be silently ignored.