Document ContentAlignment properly

[uruuru]

For the following graph I would expect the two inner atomic nodes of n1 to be center-aligned due to the contentAlignment and the expandNodes options.

Am I interpreting the options wrongly?

algorithm: rectpacking

contentAlignment: "H_CENTER V_CENTER"
expandNodes: true

node n1 {
    layout [ size: 300, 100]
    label "n1"
    node i1
    node i2
}

node n2 {
    layout [ size: 50, 100]
    label "n2"
}


node n3 {
    layout [ size: 50, 100]
    label "n3"
}


node n4 {
    layout [ size: 50, 100]
    label "n4"
}

node n5 {
    layout [ size: 500, 20]
    label "n5"
}

node n6 {
    layout [ size: 500, 20]
    label "n6"
}

[soerendomroes]

It seems to be the case that each child graph can individually decide to be aligned or not
The following produces the desired output:

algorithm: rectpacking
//contentAlignment: "H_CENTER V_CENTER"
expandNodes: true

node n1 {
    layout [ size: 300, 100]
    contentAlignment: "H_CENTER V_CENTER"
    label "n1"
    node i1
    node i2
}

node n2 {
    layout [ size: 50, 100]
    label "n2"
}


node n3 {
    layout [ size: 50, 100]
    label "n3"
}


node n4 {
    layout [ size: 50, 100]
    label "n4"
}

node n5 {
    layout [ size: 500, 20]
    label "n5"
}

node n6 {
    layout [ size: 500, 20]
    label "n6"
}

[uruuru]

Ah, I see. My bad. I guess we should add that to the documentation in the melk.