SequenceMessageAlign not working on txt output

Question

Hi,

Looks that SequenceMessageAlign has no impact on txt output.

"first", "left" and "right" result is same as "center".

@startuml
skinparam SequenceMessageAlign right
Bob -> Alice : long long long
Bob -> Alice : hello
@enduml

     ┌───┐          ┌─────┐
     │Bob│          │Alice│
     └─┬─┘          └──┬──┘
       │long long long │   
       │──────────────>│   
       │               │   
       │    hello      │   
       │──────────────>│   
     ┌─┴─┐          ┌──┴──┐
     │Bob│          │Alice│
     └───┘          └─────┘
http://www.plantuml.com/plantuml/txt/SoWkIImgAStDuIhEpimhI2nAp5K8JYqiJSrBJlLDBIvEJ4zrpCbCprCeoapFAE5ooazIqBLJ00ebfofOAUJavwKZ27JPZDISd7mkXzIy5A3v0000

br,
Hannu