unify the indention

src/i18n/languages.js

@@ -17,7 +17,7 @@ const languages = [
   'ja',
   'ja_easy',
   'ko',
-	'nan',
+  'nan',
   'nb',
   'nl',
   'oc',

src/services/locale/locale.service.js

@@ -20,7 +20,7 @@ const internalToBackendLocaleMulti = codes => {
 const getLanguageName = (code) => {
   const specialLanguageNames = {
     ja_easy: 'やさしいにほんご',
-	  nan: '臺語（閩南語）',
+    nan: '臺語（閩南語）',
     zh: '简体中文',
     zh_Hant: '繁體中文'
   }