docs: add a `@reviewed` tag to the i18n guide (#40582)

PR Close #40582

aio/content/guide/i18n.md

@@ -762,7 +762,7 @@ The HTML `base` tag with the `href` attribute specifies the base URI, or URL, fo
       "locales": {
         "fr": {
           "translation": "src/locale/messages.fr.xlf",
-          "baseHref": "" 
+          "baseHref": ""
         }
       }
     },
@@ -806,11 +806,11 @@ server {
     server_name localhost;
     root /www/data;
 
-    # Fallback to default language if no preference defined by browser 
+    # Fallback to default language if no preference defined by browser
     if ($accept_language ~ "^$") {
         set $accept_language "fr";
     }
-    
+
     # Redirect "/" to Angular app in browser's preferred language
     rewrite ^/$ /$accept_language permanent;
 
@@ -834,17 +834,17 @@ The following is an example of an Apache configuration.
         RewriteEngine on
         RewriteBase /
         RewriteRule ^../index\.html$ - [L]
-        
+
         RewriteCond %{REQUEST_FILENAME} !-f
         RewriteCond %{REQUEST_FILENAME} !-d
         RewriteRule (..) $1/index.html [L]
-        
+
         RewriteCond %{HTTP:Accept-Language} ^de [NC]
         RewriteRule ^$ /de/ [R]
-        
+
         RewriteCond %{HTTP:Accept-Language} ^en [NC]
         RewriteRule ^$ /en/ [R]
-        
+
         RewriteCond %{HTTP:Accept-Language} !^en [NC]
         RewriteCond %{HTTP:Accept-Language} !^de [NC]
         RewriteRule ^$ /fr/ [R]
@@ -979,3 +979,5 @@ Both elements now use the same translation (`Bonjour`) because they were defined
     <!-- ... -->
     <p>Bonjour</p>
   ```
+
+@reviewed 2020-04-10