Merge pull request airbnb#405 from fredericksilva/fs/fixed-additional-trailing-comma

 fixed additional trailing comma

Author: justjake

linters/.eslintrc

@@ -52,7 +52,7 @@
 /**
  * Possible errors
  */
-    "comma-dangle": [2, "never"],    // http://eslint.org/docs/rules/comma-dangle
+    "comma-dangle": [2, "always-multiline"],    // http://eslint.org/docs/rules/comma-dangle
     "no-cond-assign": [2, "always"], // http://eslint.org/docs/rules/no-cond-assign
     "no-console": 1,                 // http://eslint.org/docs/rules/no-console
     "no-debugger": 1,                // http://eslint.org/docs/rules/no-debugger