Rename Predis\Client::pubSubContext() to Predis\Client::pubSub().

examples/PubSubContext.php

@@ -9,7 +9,7 @@ require 'SharedConfigurations.php';
 $redis  = new Predis\Client($single_server + array('read_write_timeout' => 0));
 
 // Initialize a new pubsub context
-$pubsub = $redis->pubSubContext();
+$pubsub = $redis->pubSub();
 
 // Subscribe to your channels
 $pubsub->subscribe('control_channel', 'notifications');