Add jshint to grunt exec

.jshintrc

@@ -29,7 +29,6 @@
     ],
 
     "node" : true,
-    "es5" : true,
     "browser" : true,
 
     "boss" : true,

Gruntfile.js

@@ -2,6 +2,16 @@ module.exports = function(grunt) {
   grunt.initConfig({
     pkg: grunt.file.readJSON('package.json'),
 
+    jshint: {
+      options: {
+        jshintrc: '.jshintrc',
+        force: true
+      },
+      files: [
+        'lib/**/!(parser|browser-prefix|browser-suffix).js'
+      ]
+    },
+
     concat: {
       options: {
         banner: '/*!\n\n <%= pkg.name %> v<%= pkg.version %>\n\n<%= grunt.file.read("LICENSE") %>\n@license\n*/\n',
@@ -55,6 +65,7 @@ module.exports = function(grunt) {
   });
 
   grunt.loadNpmTasks('grunt-contrib-concat');
+  grunt.loadNpmTasks('grunt-contrib-jshint');
   grunt.loadNpmTasks('grunt-contrib-uglify');
 
   grunt.registerTask('dist-dir', function() {

dist/handlebars.js

@@ -844,6 +844,8 @@ Handlebars.Utils = {
   },
 
   escapeExpression: function(string) {
+    /*jshint eqnull: true */
+
     // don't escape SafeStrings, since they're already safe
     if (string instanceof Handlebars.SafeString) {
       return string.toString();

dist/handlebars.runtime.js

@@ -233,6 +233,8 @@ Handlebars.Utils = {
   },
 
   escapeExpression: function(string) {
+    /*jshint eqnull: true */
+
     // don't escape SafeStrings, since they're already safe
     if (string instanceof Handlebars.SafeString) {
       return string.toString();

lib/handlebars.js

@@ -1,3 +1,5 @@
+/*global Handlebars: true */
+
 var handlebars = require("./handlebars/base"),
 
 // Each of these augment the Handlebars object. No need to setup here.

lib/handlebars/utils.js

@@ -50,6 +50,8 @@ Handlebars.Utils = {
   },
 
   escapeExpression: function(string) {
+    /*jshint eqnull: true */
+
     // don't escape SafeStrings, since they're already safe
     if (string instanceof Handlebars.SafeString) {
       return string.toString();

package.json

@@ -25,6 +25,7 @@
     "dust": "~0.3",
     "grunt": "~0.4.1",
     "grunt-contrib-concat": "~0.3.0",
+    "grunt-contrib-jshint": "~0.6.3",
     "grunt-contrib-uglify": "~0.2.2",
     "jison": "~0.3",
     "mocha": "*",