[ci skip] style and phpdoc-related changes (rel #1295)
diff --git a/system/database/DB_forge.php b/system/database/DB_forge.php
index 91f9d56..119d78d 100644
--- a/system/database/DB_forge.php
+++ b/system/database/DB_forge.php
@@ -37,7 +37,7 @@
 	public $fields		= array();
 	public $keys		= array();
 	public $primary_keys	= array();
-	public $db_char_set	=	'';
+	public $db_char_set	= '';
 
 	// Platform specific SQL strings
 	protected $_create_database	= 'CREATE DATABASE %s';
@@ -45,6 +45,11 @@
 	protected $_drop_table		= 'DROP TABLE IF EXISTS %s';
 	protected $_rename_table	= 'ALTER TABLE %s RENAME TO %s';
 
+	/**
+	 * Constructor
+	 *
+	 * @return	void
+	 */
 	public function __construct()
 	{
 		// Assign the main database object to $this->db
@@ -206,7 +211,8 @@
 	/**
 	 * Create Table
 	 *
-	 * @param	string	the table name
+	 * @param	string	$table = ''
+	 * @param	bool	$if_not_exists = FALSE
 	 * @return	bool
 	 */
 	public function create_table($table = '', $if_not_exists = FALSE)
@@ -378,9 +384,8 @@
 	/**
 	 * Column Modify
 	 *
-	 * @param	string	the table name
-	 * @param	string	the column name
-	 * @param	string	the column definition
+	 * @param	string	$table = ''
+	 * @param	string	$field = array()	column definition
 	 * @return	bool
 	 */
 	public function modify_column($table = '', $field = array())