Selfloop labels are not inlined

[soerendomroes]

algorithm: layered
node n1
edge n1 -> n1 {
  label "onEdge" {
    inline: true
  }
}
edge n1 -> n2 {
  label "onEdge" {
    inline: true
  }
}
node n2

Self loop labels are not inlined, while normal edge labels are.