remove module argument in constructor

js/module/array1d.js

 function Array1DTracer(module) {
-    return Array2DTracer.call(this, module || Array1DTracer);
+    return Array2DTracer.call(this);
 }
 
 Array1DTracer.prototype = $.extend(true, Object.create(Array2DTracer.prototype), {

js/module/array2d.js

 function Array2DTracer(module) {
-    if (Tracer.call(this, module || Array2DTracer)) {
+    if (Tracer.call(this)) {
         Array2DTracer.prototype.init.call(this);
         return true;
     }

js/module/directed_graph.js

 function DirectedGraphTracer(module) {
-    if (Tracer.call(this, module || DirectedGraphTracer)) {
+    if (Tracer.call(this)) {
         DirectedGraphTracer.prototype.init.call(this);
         return true;
     }

js/module/log_tracer.js

 function LogTracer(module) {
-    if (Tracer.call(this, module || LogTracer)) {
+    if (Tracer.call(this)) {
         LogTracer.prototype.init.call(this);
         return true;
     }

js/module/tracer.js

-function Tracer(module) {
-    this.module = module || Tracer;
+function Tracer() {
+    this.module = this.constructor;
     this.capsule = tm.allocate(this);
     $.extend(this, this.capsule);
     if (this.new) {

js/module/undirected_graph.js

 function UndirectedGraphTracer(module) {
-    if (DirectedGraphTracer.call(this, module || UndirectedGraphTracer)) {
+    if (DirectedGraphTracer.call(this)) {
         UndirectedGraphTracer.prototype.init.call(this);
         return true;
     }

js/module/weighted_directed_graph.js

 function WeightedDirectedGraphTracer(module) {
-    if (DirectedGraphTracer.call(this, module || WeightedDirectedGraphTracer)) {
+    if (DirectedGraphTracer.call(this)) {
         WeightedDirectedGraphTracer.prototype.init.call(this);
         return true;
     }

js/module/weighted_undirected_graph.js

 function WeightedUndirectedGraphTracer(module) {
-    if (WeightedDirectedGraphTracer.call(this, module || WeightedUndirectedGraphTracer)) {
+    if (WeightedDirectedGraphTracer.call(this)) {
         WeightedUndirectedGraphTracer.prototype.init.call(this);
         return true;
     }