Update gitignore (sorry)

electron/node_modules/sprintf-js/src/angular-sprintf.js

@@ -0,0 +1,24 @@
+/* global angular, sprintf, vsprintf */
+
+!function() {
+    'use strict'
+
+    angular.
+        module('sprintf', []).
+        filter('sprintf', function() {
+            return function() {
+                return sprintf.apply(null, arguments)
+            }
+        }).
+        filter('fmt', ['$filter', function($filter) {
+            return $filter('sprintf')
+        }]).
+        filter('vsprintf', function() {
+            return function(format, argv) {
+                return vsprintf(format, argv)
+            }
+        }).
+        filter('vfmt', ['$filter', function($filter) {
+            return $filter('vsprintf')
+        }])
+}(); // eslint-disable-line