diff --git a/README.txt b/README.txt
index a124e98..6404eff 100644
--- a/README.txt
+++ b/README.txt
@@ -44,7 +44,7 @@ This module provides 2 ways to use postal code data.
 
 First one, a function is named `japan_postal_code_get_address_by_postal_code()`.
 This is for backend developers. It takes a 7-digit postal code in Japan (it may
-contain `-` like 100-0001) and returns the address releated with the postal
+contain `-` like 100-0001) and returns the address related with the postal
 code. The address is a `stdClass` object with 5 members: postal_code,
 prefecture, city, address_under_city and name. For example,
 `japan_postal_code_get_address_by_postal_code('1000001')` returns the following
diff --git a/japan_postal_code.drush.inc b/japan_postal_code.drush.inc
index 5f5af99..3af5c3e 100644
--- a/japan_postal_code.drush.inc
+++ b/japan_postal_code.drush.inc
@@ -12,10 +12,10 @@ function japan_postal_code_drush_command() {
   $items = array();
   $items['japan-postal-code-update'] = array(
     'callback' => 'japan_postal_code_drush_update',
-    'description' => 'Fetch and update the Japan postal code data.',
+    'description' => dt('Fetch and update the Japan postal code data.'),
     'aliases' => array('jpc-update'),
     'examples' => array(
-      'drush japan-postal-code-update' => 'Fetch and update the Japan postal code data.',
+      'drush japan-postal-code-update' => dt('Fetch and update the Japan postal code data.'),
     ),
   );
 
@@ -23,17 +23,7 @@ function japan_postal_code_drush_command() {
 }
 
 /**
- * Implements hook_drush_help().
- */
-function japan_postal_code_drush_help($section) {
-  switch ($section) {
-    case 'drush:delete-all':
-      return dt("Delete all nodes, nodes of a specific content type or users.");
-  }
-}
-
-/**
- * Drush callback to fetch and upate the Japan postal code.
+ * Drush callback to fetch and update the Japan postal code.
  *
  * @see japan_postal_code_config_form_submit()
  */
diff --git a/japan_postal_code.module b/japan_postal_code.module
index 2378cb3..a8c79f8 100644
--- a/japan_postal_code.module
+++ b/japan_postal_code.module
@@ -361,7 +361,9 @@ function _japan_postal_code_clean_japanese_string($raw_japanese_string) {
  */
 function _japan_postal_code_clean_address($address_under_city) {
   // Strip the unnecessary part of the address data.
-  if ($address_under_city === '以下に掲載がない場合') {
+  // The sentence means "all other addresses not listed bellow" in Japanese.
+  $description_without_actual_address = '以下に掲載がない場合';
+  if ($address_under_city === $description_without_actual_address) {
     return '';
   }
 
diff --git a/japan_postal_code.test b/japan_postal_code.test
index a33f547..7a09e82 100644
--- a/japan_postal_code.test
+++ b/japan_postal_code.test
@@ -18,8 +18,6 @@ class JapanPostalCodeFunctionalTestCase extends DrupalWebTestCase {
 
   /**
    * Implementes getInfo().
-   *
-   * @see DrupalWebTestCase::setUp()
    */
   public static function getInfo() {
     return array(
@@ -38,7 +36,7 @@ class JapanPostalCodeFunctionalTestCase extends DrupalWebTestCase {
     // Create and log in our privileged user.
     $this->privilegedUser = $this->drupalCreateUser(array(
       'configure japan postal code',
-      ));
+    ));
     $this->drupalLogin($this->privilegedUser);
   }