[Tagging] barrier enforcing maxwidth

[Mateusz Konieczny]

On Tue, 08 Sep 2015 12:38:53 +0900
johnw <johnw at mac.com> wrote:

> Is this a reason for creating barrier=width_restrictor ? 

Yes, construction itself also may be mapped (in addition to maxwidth).
Though it would be a good idea to document it on wiki (maybe put through
proposal to ensure that it is not duplicating something already
documented).