Disallow trailing whitespace

// FREEBIE

.jscsrc

@@ -1,3 +1,4 @@
 {
-  "disallowMixedSpacesAndTabs": true
+  "disallowMixedSpacesAndTabs": true,
+  "disallowTrailingWhitespace": true
 }

Gruntfile.js

@@ -134,7 +134,15 @@ module.exports = function(grunt) {
     },
     jscs: {
       all: {
-        src: ['js/**/*.js', '!js/libtextsecure.js', '!js/libaxolotl-worker.js', '!js/components.js', 'test/**/*.js']
+        src: [
+        'Gruntfile',
+        'js/**/*.js',
+        '!js/libtextsecure.js',
+        '!js/libaxolotl-worker.js',
+        '!js/components.js',
+        'test/**/*.js',
+        '!test/blanket_mocha.js',
+        ]
       }
     },
     watch: {
@@ -142,6 +150,10 @@ module.exports = function(grunt) {
         files: ['<%= jshint.files %>', './js/**/*.js'],
         tasks: ['jshint']
       },
+      style: {
+        files: ['<%= jscs.all.src %>', './js/**/*.js'],
+        tasks: ['jscs']
+      },
       sass: {
         files: ['./stylesheets/*.scss'],
         tasks: ['sass']