Source code formatter adds superfluous line break to OR patterns

[istvanrath]

E.g.

pattern inEdge(Activity)= {
    find sequenceFlowEdge(SeqEdgeTo, SomeActivity, Activity);
}
   // <-- this is unnecessary
or {
    find messageFlowEdge(MessEdgeTo, SomeMessActivity, Activity);
}

// instead would be good:
pattern inEdge(Activity)= {
    find sequenceFlowEdge(SeqEdgeTo, SomeActivity, Activity);
} or {
    find messageFlowEdge(MessEdgeTo, SomeMessActivity, Activity);
}

[ujhelyiz]

Fixed in master.