2928     function substitute(template, substitutions)  argument
2931             var replacement = template(substitutions);
2936             return substitute(replacement, substitutions);
2940             return substitute_single(template, substitutions);
2944                               return substitute(x, substitutions);
2948     function substitute_single(template, substitutions)  argument
2958                     rv.push(String(substitutions[components[i + 1]]));
2980                     var replacement = substitute(children[i], substitutions);
3038     function make_dom(template, substitutions, output_document)  argument
3049     function render(template, substitutions, output_document)  argument
3051         return make_dom(substitute(template, substitutions), output_document);
3057     function assert(expected_true, function_name, description, error, substitutions)  argument
3064                                    error, substitutions);
3124     function make_message(function_name, description, error, substitutions)  argument
3126         for (var p in substitutions) {
3127             if (substitutions.hasOwnProperty(p)) {
3128                 substitutions[p] = format_value(substitutions[p]);
3134                                           substitutions));