diff --git a/system/core/Input.php b/system/core/Input.php
index b0bbb7b..e1319be 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -682,7 +682,7 @@
 		/* We strip slashes if magic quotes is on to keep things consistent
 
 		   NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and
-			 it will probably not exist in future versions at all.
+		         it will probably not exist in future versions at all.
 		*/
 		if ( ! is_php('5.4') && get_magic_quotes_gpc())
 		{
@@ -844,7 +844,7 @@
 	 * Test to see if a request was made from the command line.
 	 *
 	 * @deprecated	3.0.0	Use is_cli() instead
-	 * @return      bool
+	 * @return	bool
 	 */
 	public function is_cli_request()
 	{
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 1f48c07..5de7a94 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -514,7 +514,7 @@
 	 *
 	 * Clears the cached variables.
 	 *
-	 * @return  object
+	 * @return	CI_Loader
 	 */
 	public function clear_vars()
 	{
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index d2bce5c..e58496d 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -451,7 +451,7 @@
 	 *
 	 * This is just a dummy method that all drivers will override.
 	 *
-	 * @return      mixed
+	 * @return	mixed
 	 */
 	public function db_connect()
 	{
@@ -481,7 +481,7 @@
 	 * This is just a dummy method to allow drivers without such
 	 * functionality to not declare it, while others will override it.
 	 *
-	 * @return      void
+	 * @return	void
 	 */
 	public function reconnect()
 	{
@@ -495,7 +495,7 @@
 	 * This is just a dummy method to allow drivers without such
 	 * functionality to not declare it, while others will override it.
 	 *
-	 * @return      bool
+	 * @return	bool
 	 */
 	public function db_select()
 	{
diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index 3c57777..f2e40da 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -306,12 +306,12 @@
 	 *
 	 * params array keys
 	 *
-	 * KEY	  OPTIONAL	NOTES
-	 * name		no	the name of the parameter should be in :<param_name> format
-	 * value	no	the value of the parameter.  If this is an OUT or IN OUT parameter,
-	 *				this should be a reference to a variable
-	 * type		yes	the type of the parameter
-	 * length	yes	the max size of the parameter
+	 * KEY      OPTIONAL  NOTES
+	 * name     no        the name of the parameter should be in :<param_name> format
+	 * value    no        the value of the parameter.  If this is an OUT or IN OUT parameter,
+	 *                    this should be a reference to a variable
+	 * type     yes       the type of the parameter
+	 * length   yes       the max size of the parameter
 	 */
 	public function stored_procedure($package, $procedure, array $params)
 	{
diff --git a/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php b/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
index cf5a0c7..7a767ef 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
@@ -158,7 +158,7 @@
 	 * @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_dblib_driver.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
index 844ffab..ae2b998 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
@@ -227,7 +227,7 @@
 	 * @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_firebird_driver.php b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
index 3bd5c93..0bafde8 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
@@ -211,7 +211,7 @@
 	 *
 	 * @param	string	$table
 	 * @return	string
-         */
+	 */
 	protected function _truncate($table)
 	{
 		return 'DELETE FROM '.$table;
diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index c69283a..e813efd 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -779,7 +779,7 @@
 			$this->y_axis = 0;
 		}
 
-		//  Create the image handle
+		// Create the image handle
 		if ( ! ($src_img = $this->image_create_gd()))
 		{
 			return FALSE;
@@ -1195,7 +1195,7 @@
 			$x_axis += $this->orig_width - $wm_width;
 		}
 
-		//  Build the finalized image
+		// Build the finalized image
 		if ($wm_img_type === 3 && function_exists('imagealphablending'))
 		{
 			@imagealphablending($src_img, TRUE);
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 20ddfc1..8a2dec7 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -1023,7 +1023,7 @@
 
 		if (count($x) === 1)
 		{
-		    return '';
+			return '';
 		}
 
 		$ext = ($this->file_ext_tolower) ? strtolower(end($x)) : end($x);