Fix GitbookIO#804: correctly extract kwargs from blocks

Author: SamyPesse

lib/template.js

@@ -250,7 +250,7 @@ TemplateEngine.prototype.addBlock = function(name, block) {
 
             // Extract main body and kwargs
             var body = args.pop();
-            var kwargs = args.pop() || {};
+            var kwargs = _.isObject(_.last(args))? args.pop() : {};
 
             // Extract blocks body
             var _blocks =  _.map(block.blocks, function(blockName, i){