Remove trailing whitespace.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>

library/HTMLPurifier/AttrDef.php

@@ -2,53 +2,53 @@
 
 /**
  * Base class for all validating attribute definitions.
- * 
+ *
  * This family of classes forms the core for not only HTML attribute validation,
  * but also any sort of string that needs to be validated or cleaned (which
- * means CSS properties and composite definitions are defined here too).  
+ * means CSS properties and composite definitions are defined here too).
  * Besides defining (through code) what precisely makes the string valid,
  * subclasses are also responsible for cleaning the code if possible.
  */
 
 abstract class HTMLPurifier_AttrDef
 {
-    
+
     /**
      * Tells us whether or not an HTML attribute is minimized. Has no
      * meaning in other contexts.
      */
     public $minimized = false;
-    
+
     /**
      * Tells us whether or not an HTML attribute is required. Has no
      * meaning in other contexts
      */
     public $required = false;
-    
+
     /**
      * Validates and cleans passed string according to a definition.
-     * 
+     *
      * @param $string String to be validated and cleaned.
      * @param $config Mandatory HTMLPurifier_Config object.
      * @param $context Mandatory HTMLPurifier_AttrContext object.
      */
     abstract public function validate($string, $config, $context);
-    
+
     /**
      * Convenience method that parses a string as if it were CDATA.
-     * 
+     *
      * This method process a string in the manner specified at
      * <http://www.w3.org/TR/html4/types.html#h-6.2> by removing
      * leading and trailing whitespace, ignoring line feeds, and replacing
      * carriage returns and tabs with spaces.  While most useful for HTML
      * attributes specified as CDATA, it can also be applied to most CSS
      * values.
-     * 
+     *
      * @note This method is not entirely standards compliant, as trim() removes
      *       more types of whitespace than specified in the spec. In practice,
      *       this is rarely a problem, as those extra characters usually have
      *       already been removed by HTMLPurifier_Encoder.
-     * 
+     *
      * @warning This processing is inconsistent with XML's whitespace handling
      *          as specified by section 3.3.3 and referenced XHTML 1.0 section
      *          4.7.  However, note that we are NOT necessarily
@@ -60,7 +60,7 @@ abstract class HTMLPurifier_AttrDef
         $string = str_replace(array("\n", "\t", "\r"), ' ', $string);
         return $string;
     }
-    
+
     /**
      * Factory method for creating this class from a string.
      * @param $string String construction info
@@ -73,7 +73,7 @@ abstract class HTMLPurifier_AttrDef
         // to clone or instantiate new copies. (Instantiation is safer.)
         return $this;
     }
-    
+
     /**
      * Removes spaces from rgb(0, 0, 0) so that shorthand CSS properties work
      * properly. THIS IS A HACK!
@@ -81,6 +81,6 @@ abstract class HTMLPurifier_AttrDef
     protected function mungeRgb($string) {
         return preg_replace('/rgb\((\d+)\s*,\s*(\d+)\s*,\s*(\d+)\)/', 'rgb(\1,\2,\3)', $string);
     }
-    
+
 }