Merge pull request #1068 from 0xack13/master

Fix typo

Author: kpdecker

lib/handlebars/base.js

@@ -61,7 +61,7 @@ HandlebarsEnvironment.prototype = {
 function registerDefaultHelpers(instance) {
   instance.registerHelper('helperMissing', function(/* [args, ]options */) {
     if (arguments.length === 1) {
-      // A missing field in a {{foo}} constuct.
+      // A missing field in a {{foo}} construct.
       return undefined;
     } else {
       // Someone is actually trying to call something, blow up.