various code style and whitespace adjustments

framework/validators/FileValidator.php

@@ -122,7 +122,7 @@ class FileValidator extends Validator
      * - {mimeTypes}: the value of [[mimeTypes]]
      */
     public $wrongMimeType;
-    
+
 
     /**
      * @inheritdoc

framework/validators/SafeValidator.php

@@ -12,12 +12,12 @@ namespace yii\validators;
  *
  * This class is required because of the way in which Yii determines whether a property is safe for massive assignment, that is,
  * when a user submits form data to be loaded into a model directly from the POST data, is it ok for a property to be copied.
- * In many cases, this is required but because sometimes properties are internal and you do not want the POST data to be able to 
+ * In many cases, this is required but because sometimes properties are internal and you do not want the POST data to be able to
  * override these internal values (especially things like database row ids), Yii assumes all values are unsafe for massive assignment
  * unless a rule exists for the property, which in most cases it will. Sometimes, however, an item is safe for massive assigment but
  * does not have a rule associated with it - for instance, due to no validation being performed, in which case, you use this class
  * as a rule for that property. Although it has no functionality, it allows Yii to determine that the property is safe to copy.
- * 
+ *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */