remove duplicated phpdocs

lib/Twig/Extension.php

@@ -11,20 +11,14 @@
 abstract class Twig_Extension implements Twig_ExtensionInterface
 {
     /**
-     * Initializes the runtime environment.
-     *
-     * This is where you can load some file that contains filter functions for instance.
-     *
-     * @param Twig_Environment $environment The current Twig_Environment instance
+     * {@inheritdoc}
      */
     public function initRuntime(Twig_Environment $environment)
     {
     }
 
     /**
-     * Returns the token parser instances to add to the existing list.
-     *
-     * @return Twig_TokenParserInterface[]
+     * {@inheritdoc}
      */
     public function getTokenParsers()
     {
@@ -32,9 +26,7 @@ abstract class Twig_Extension implements Twig_ExtensionInterface
     }
 
     /**
-     * Returns the node visitor instances to add to the existing list.
-     *
-     * @return Twig_NodeVisitorInterface[] An array of Twig_NodeVisitorInterface instances
+     * {@inheritdoc}
      */
     public function getNodeVisitors()
     {
@@ -42,9 +34,7 @@ abstract class Twig_Extension implements Twig_ExtensionInterface
     }
 
     /**
-     * Returns a list of filters to add to the existing list.
-     *
-     * @return Twig_SimpleFilter[]
+     * {@inheritdoc}
      */
     public function getFilters()
     {
@@ -52,9 +42,7 @@ abstract class Twig_Extension implements Twig_ExtensionInterface
     }
 
     /**
-     * Returns a list of tests to add to the existing list.
-     *
-     * @return Twig_SimpleTest[]
+     * {@inheritdoc}
      */
     public function getTests()
     {
@@ -62,9 +50,7 @@ abstract class Twig_Extension implements Twig_ExtensionInterface
     }
 
     /**
-     * Returns a list of functions to add to the existing list.
-     *
-     * @return Twig_SimpleFunction[]
+     * {@inheritdoc}
      */
     public function getFunctions()
     {
@@ -72,9 +58,7 @@ abstract class Twig_Extension implements Twig_ExtensionInterface
     }
 
     /**
-     * Returns a list of operators to add to the existing list.
-     *
-     * @return array An array of operators
+     * {@inheritdoc}
      */
     public function getOperators()
     {
@@ -82,9 +66,7 @@ abstract class Twig_Extension implements Twig_ExtensionInterface
     }
 
     /**
-     * Returns a list of global variables to add to the existing list.
-     *
-     * @return array An array of global variables
+     * {@inheritdoc}
      */
     public function getGlobals()
     {