4356     function substitute(template, substitutions)  argument
4359             var replacement = template(substitutions);
4364             return substitute(replacement, substitutions);
4368             return substitute_single(template, substitutions);
4372                               return substitute(x, substitutions);
4376     function substitute_single(template, substitutions)  argument
4386                     rv.push(String(substitutions[components[i + 1]]));
4408                     var replacement = substitute(children[i], substitutions);
4466     function make_dom(template, substitutions, output_document)  argument
4477     function render(template, substitutions, output_document)  argument
4479         return make_dom(substitute(template, substitutions), output_document);
4485     function assert(expected_true, function_name, description, error, substitutions)  argument
4489                                    error, substitutions);
4557     function make_message(function_name, description, error, substitutions)  argument
4559         for (var p in substitutions) {
4560             if (substitutions.hasOwnProperty(p)) {
4561                 substitutions[p] = format_value(substitutions[p]);
4567                                           substitutions));