Mistake assert tips in FST builder ？

[zhenyuan wei]

Hi，
   With current newest version, 9.0.0-snapshot，In
Builder.UnCompileNode.addArc() function，
found this line：

assert numArcs == 0 || label > arcs[numArcs-1].label: "arc[-1].label="
+ arcs[numArcs-1].label + " new label=" + label + " numArcs=" +
numArcs;

Maybe assert tips is ：

assert numArcs == 0 || label > arcs[numArcs-1].label:
"arc[numArc-1].label=" + arcs[numArcs-1].label + " new label=" + label
+ " numArcs=" + numArcs;

Is it a personal tips code style? or small mistake?

Just curious about it.