Correcting yourself using sed syntax is a common IRC idiom. In that sense the design is sensible; you build your interface on what a lot of users already do hab

Correcting yourself using sed syntax is a common IRC idiom. In that sense the design is sensible; you build your interface on what a lot of users already do habitually and let it have the desired effect. For everyone else it's just a very terse and simple syntax that anyway has an obvious mouse based equivalent.