diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index e77fba6..b0e86ed 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -1508,7 +1508,7 @@
 				$row = $clean;
 			}
 
-			$this->qb_set[] =  '('.implode(',', $row).')';
+			$this->qb_set[] = '('.implode(',', $row).')';
 		}
 
 		foreach ($keys as $k)
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index 1189f30..5af4437 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -323,12 +323,12 @@
 		if (is_array($str))
 		{
 			foreach ($str as $key => $val)
-	   		{
+			{
 				$str[$key] = $this->escape_str($val, $like);
-	   		}
+			}
 
-	   		return $str;
-	   	}
+			return $str;
+		}
 
 		$str = is_resource($this->conn_id) ? mysql_real_escape_string($str, $this->conn_id) : addslashes($str);
 
@@ -481,7 +481,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}
diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index 78a4bef..17f025f 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -466,7 +466,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index a01a9d6..29b2281 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -336,7 +336,7 @@
 	 * @param	string	$table
 	 * @param	array	$values
 	 * @return	string
-         */
+	 */
 	protected function _update($table, $values)
 	{
 		$this->qb_limit = FALSE;
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index 923f0e1..d2dfa8b 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -387,7 +387,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
index c2112d6..7e703e7 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
@@ -185,7 +185,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php b/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
index 4d84368..2ef97cd 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
@@ -187,7 +187,7 @@
 	 * @param	string	$table
 	 * @param	array	$values
 	 * @return	string
-         */
+	 */
 	protected function _update($table, $values)
 	{
 		$this->qb_limit = FALSE;
diff --git a/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
index 1db5205..cfb474e 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
@@ -237,7 +237,7 @@
 	 * @param	string	$table
 	 * @param	array	$values
 	 * @return	string
-         */
+	 */
 	protected function _update($table, $values)
 	{
 		$this->qb_limit = FALSE;
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
index b54765d..a293972 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -221,7 +221,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
index 05b34fa..c940a7b 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
@@ -167,7 +167,7 @@
 				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
 		}
 
-                return $sql;
+		return $sql;
 	}
 
 	// --------------------------------------------------------------------
@@ -195,7 +195,7 @@
 	 * @param	string	$table
 	 * @param	array	$values
 	 * @return	string
-         */
+	 */
 	protected function _update($table, $values)
 	{
 		$this->qb_limit = FALSE;
diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
index 803cc24..1300772 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
@@ -251,7 +251,7 @@
 	 * @param	string	$table
 	 * @param	array	$values
 	 * @return	string
-         */
+	 */
 	protected function _update($table, $values)
 	{
 		$this->qb_limit = FALSE;
@@ -282,7 +282,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
index cd69650..568044e 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
@@ -190,7 +190,7 @@
 	 *
 	 * @param	string	$table
 	 * @return	string
-         */
+	 */
 	protected function _truncate($table)
 	{
 		return 'DELETE FROM '.$table;
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
index b28197c..ec02526 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
@@ -250,7 +250,7 @@
 	 * @param	string	$table
 	 * @param	array	$values
 	 * @return	string
-         */
+	 */
 	protected function _update($table, $values)
 	{
 		$this->qb_limit = FALSE;
diff --git a/system/database/drivers/postgre/postgre_driver.php b/system/database/drivers/postgre/postgre_driver.php
index 02db808..2a78a57 100644
--- a/system/database/drivers/postgre/postgre_driver.php
+++ b/system/database/drivers/postgre/postgre_driver.php
@@ -579,7 +579,7 @@
 			{
 				if ($field !== $index)
 				{
-					$final[$field][] =  'WHEN '.$val[$index].' THEN '.$val[$field];
+					$final[$field][] = 'WHEN '.$val[$index].' THEN '.$val[$field];
 				}
 			}
 		}