added missing ;

manual/codes/Hierarchical data - Nested set - Tree options.php

 <?php
 $options = array('has_many_roots' => true,			// enable many roots
-	  			 'root_column_name' => 'root_id')	// set root column name, defaults to 'root_id'
+	  			 'root_column_name' => 'root_id');	// set root column name, defaults to 'root_id'
 
 // To create new root nodes, if you have manually set the root_id, then it will be used
 // otherwise it will automatically use the next available root id