Update config.php

-Replace tabs with spaces.
-Replace the word "files" with "files", because there is only one

installer/config.php

@@ -28,29 +28,29 @@ if (!empty($_POST['submit'])) {
 
   if($RCI->save_configfile())
   {
-    echo '<p class="notice">The config files was saved successfully into <tt>'.RCMAIL_CONFIG_DIR.'</tt> directory of your Roundcube installation.';
+     echo '<p class="notice">The config file was saved successfully into <tt>'.RCMAIL_CONFIG_DIR.'</tt> directory of your Roundcube installation.';
 
-	if($RCI->legacy_config) {
-		echo '<br/><br/>Afterwards, please <b>remove</b> the old configuration files <tt>main.inc.php</tt> and <tt>db.inc.php</tt> from the config directory.';
-	}
+     if($RCI->legacy_config) {
+        echo '<br/><br/>Afterwards, please <b>remove</b> the old configuration files <tt>main.inc.php</tt> and <tt>db.inc.php</tt> from the config directory.';
+     }
 
-	echo '</p>';
+     echo '</p>';
   }
   else
   {
-	echo '<p class="notice">Copy or download the following configuration and save it';
-	echo ' as <tt><b>config.inc.php</b></tt> within the <tt>'.RCUBE_CONFIG_DIR.'</tt> directory of your Roundcube installation.<br/>';
-	echo ' Make sure that there are no characters outside the <tt>&lt;?php ?&gt;</tt> brackets when saving the file.';
-	echo '&nbsp;<input type="button" onclick="location.href=\'index.php?_getconfig=1\'" value="Download" />';
+      echo '<p class="notice">Copy or download the following configuration and save it';
+      echo ' as <tt><b>config.inc.php</b></tt> within the <tt>'.RCUBE_CONFIG_DIR.'</tt> directory of your Roundcube installation.<br/>';
+      echo ' Make sure that there are no characters outside the <tt>&lt;?php ?&gt;</tt> brackets when saving the file.';
+      echo '&nbsp;<input type="button" onclick="location.href=\'index.php?_getconfig=1\'" value="Download" />';
 
-	if($RCI->legacy_config) {
-		echo '<br/><br/>Afterwards, please <b>remove</b> the old configuration files <tt>main.inc.php</tt> and <tt>db.inc.php</tt> from the config directory.';
-	}
+      if($RCI->legacy_config) {
+         echo '<br/><br/>Afterwards, please <b>remove</b> the old configuration files <tt>main.inc.php</tt> and <tt>db.inc.php</tt> from the config directory.';
+      }
 
-	echo '</p>';
+      echo '</p>';
 
-	$textbox = new html_textarea(array('rows' => 16, 'cols' => 60, 'class' => "configfile"));
-	echo $textbox->show(($_SESSION['config']));
+      $textbox = new html_textarea(array('rows' => 16, 'cols' => 60, 'class' => "configfile"));
+      echo $textbox->show(($_SESSION['config']));
   }
 
   echo '<p class="hint">Of course there are more options to configure.