REST API - List of branches is not a JSON List (BB-4242)

The REST API allows a repository to be queried for a list of branches. What is returned by the API is a JSON litteral, not a list of branches.

{
"master":

{ ... },
"trunk": { ... }

}

It should be formed something like {[

{ "name" : "master", ... }

,

{ "name" : "trunk", ... }

]}

It would also be useful if it could also return if the branch is currently involved in a pull-request.