Merge pull request #1444 from cinan/093e9bdaa1b215a7e9190ab63d6131ee3ab8d726

update Unit Tests readme
diff --git a/application/config/mimes.php b/application/config/mimes.php
index b9160d9..15493af 100644
--- a/application/config/mimes.php
+++ b/application/config/mimes.php
@@ -162,7 +162,8 @@
 	'flac'  =>	'audio/x-flac',
 	'ogg'   =>	'audio/ogg',
 	'kmz'	=>	array('application/vnd.google-earth.kmz', 'application/zip', 'application/x-zip'),
-	'kml'	=>	array('application/vnd.google-earth.kml+xml', 'application/xml', 'text/xml')
+	'kml'	=>	array('application/vnd.google-earth.kml+xml', 'application/xml', 'text/xml'),
+	'ics'	=>	'text/calendar'
 );
 
 /* End of file mimes.php */
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index c3735da..c7caf0f 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -114,13 +114,8 @@
 	 */
 	public function trans_begin($test_mode = FALSE)
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -128,7 +123,7 @@
 		// Reset the transaction failure flag.
 		// If the $test_mode flag is set to TRUE transactions will be rolled back
 		// even if the queries produce a successful result.
-		$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+		$this->_trans_failure = ($test_mode === TRUE);
 
 		return odbc_autocommit($this->conn_id, FALSE);
 	}
@@ -142,13 +137,8 @@
 	 */
 	public function trans_commit()
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -167,13 +157,8 @@
 	 */
 	public function trans_rollback()
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -204,7 +189,6 @@
 			return $str;
 		}
 
-		// ODBC doesn't require escaping
 		$str = remove_invisible_characters($str);
 
 		// escape LIKE condition wildcards
@@ -277,7 +261,7 @@
 	 */
 	protected function _list_columns($table = '')
 	{
-		return "SHOW COLUMNS FROM ".$table;
+		return 'SHOW COLUMNS FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -292,7 +276,7 @@
 	 */
 	protected function _field_data($table)
 	{
-		return "SELECT TOP 1 FROM ".$table;
+		return 'SELECT TOP 1 FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -363,8 +347,7 @@
 	 */
 	protected function _limit($sql, $limit, $offset)
 	{
-		// Does ODBC doesn't use the LIMIT clause?
-		return $sql;
+		return $sql.($offset == 0 ? '' : $offset.', ').$limit;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/odbc/odbc_forge.php b/system/database/drivers/odbc/odbc_forge.php
index ce7a1d2..b074c58 100644
--- a/system/database/drivers/odbc/odbc_forge.php
+++ b/system/database/drivers/odbc/odbc_forge.php
@@ -66,41 +66,30 @@
 			// entered the field information, so we'll simply add it to the list
 			if (is_numeric($field))
 			{
-				$sql .= "\n\t$attributes";
+				$sql .= "\n\t".$attributes;
 			}
 			else
 			{
 				$attributes = array_change_key_case($attributes, CASE_UPPER);
 
-				$sql .= "\n\t".$this->db->protect_identifiers($field);
+				$sql .= "\n\t".$this->db->escape_identifiers($field).' '.$attributes['TYPE'];
 
-				$sql .=  ' '.$attributes['TYPE'];
+				empty($attributes['CONSTRAINT']) OR $sql .= '('.$attributes['CONSTRAINT'].')';
 
-				if (array_key_exists('CONSTRAINT', $attributes))
-				{
-					$sql .= '('.$attributes['CONSTRAINT'].')';
-				}
-
-				if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
+				if ( ! empty($attributes['UNSIGNED']) && $attributes['UNSIGNED'] === TRUE)
 				{
 					$sql .= ' UNSIGNED';
 				}
 
-				if (array_key_exists('DEFAULT', $attributes))
+				if (isset($attributes['DEFAULT']))
 				{
-					$sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
+					$sql .= " DEFAULT '".$attributes['DEFAULT']."'";
 				}
 
-				if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
-				{
-					$sql .= ' NULL';
-				}
-				else
-				{
-					$sql .= ' NOT NULL';
-				}
+				$sql .= ( ! empty($attributes['NULL']) && $attributes['NULL'] === TRUE)
+					? ' NULL' : ' NOT NULL';
 
-				if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
+				if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE)
 				{
 					$sql .= ' AUTO_INCREMENT';
 				}
@@ -115,30 +104,22 @@
 
 		if (count($primary_keys) > 0)
 		{
-			$primary_keys = $this->db->protect_identifiers($primary_keys);
-			$sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
+			$sql .= ",\n\tPRIMARY KEY (".implode(', ', $this->escape_identifiers($primary_keys)).')';
 		}
 
 		if (is_array($keys) && count($keys) > 0)
 		{
 			foreach ($keys as $key)
 			{
-				if (is_array($key))
-				{
-					$key = $this->db->protect_identifiers($key);
-				}
-				else
-				{
-					$key = array($this->db->protect_identifiers($key));
-				}
+				$key = is_array($key)
+					? $this->db->escape_identifiers($key)
+					: array($this->db->escape_identifiers($key));
 
-				$sql .= ",\n\tFOREIGN KEY (" . implode(', ', $key) . ")";
+				$sql .= ",\n\tFOREIGN KEY (".implode(', ', $key).')';
 			}
 		}
 
-		$sql .= "\n)";
-
-		return $sql;
+		return $sql."\n)";
 	}
 
 	// --------------------------------------------------------------------
@@ -160,7 +141,7 @@
 	 */
 	protected function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
 	{
-		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name);
+		$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' '.$alter_type.' '.$this->db->escape_identifiers($column_name);
 
 		// DROP has everything it needs now.
 		if ($alter_type === 'DROP')
@@ -168,29 +149,10 @@
 			return $sql;
 		}
 
-		$sql .= " $column_definition";
-
-		if ($default_value !== '')
-		{
-			$sql .= " DEFAULT \"$default_value\"";
-		}
-
-		if ($null === NULL)
-		{
-			$sql .= ' NULL';
-		}
-		else
-		{
-			$sql .= ' NOT NULL';
-		}
-
-		if ($after_field !== '')
-		{
-			return $sql.' AFTER '.$this->db->protect_identifiers($after_field);
-		}
-
-		return $sql;
-
+		return $sql.' '.$column_definition
+			.($default_value != '' ? ' DEFAULT "'.$default_value.'"' : '')
+			.($null === NULL ? ' NULL' : ' NOT NULL')
+			.($after_field != '' ? ' AFTER '.$this->db->escape_identifiers($after_field) : '');
 	}
 
 }
diff --git a/system/database/drivers/odbc/odbc_result.php b/system/database/drivers/odbc/odbc_result.php
index ecba597..227fe4f 100644
--- a/system/database/drivers/odbc/odbc_result.php
+++ b/system/database/drivers/odbc/odbc_result.php
@@ -59,8 +59,6 @@
 		return $this->num_rows;
 	}
 
-	// --------------------------------------------------------------------
-
 	/**
 	 * Number of fields in the result set
 	 *
@@ -148,14 +146,9 @@
 	 */
 	protected function _fetch_assoc()
 	{
-		if (function_exists('odbc_fetch_array'))
-		{
-			return odbc_fetch_array($this->result_id);
-		}
-		else
-		{
-			return $this->_odbc_fetch_array($this->result_id);
-		}
+		return function_exists('odbc_fetch_array')
+			? odbc_fetch_array($this->result_id)
+			: $this->_odbc_fetch_array($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -169,14 +162,9 @@
 	 */
 	protected function _fetch_object()
 	{
-		if (function_exists('odbc_fetch_object'))
-		{
-			return odbc_fetch_object($this->result_id);
-		}
-		else
-		{
-			return $this->_odbc_fetch_object($this->result_id);
-		}
+		return function_exists('odbc_fetch_object')
+			? odbc_fetch_object($this->result_id)
+			: $this->_odbc_fetch_object($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -192,15 +180,18 @@
 	protected function _odbc_fetch_object(& $odbc_result)
 	{
 		$rs = array();
-		$rs_obj = FALSE;
-		if (odbc_fetch_into($odbc_result, $rs))
+		if ( ! odbc_fetch_into($odbc_result, $rs))
 		{
-			foreach ($rs as $k => $v)
-			{
-				$field_name = odbc_field_name($odbc_result, $k+1);
-				$rs_obj->$field_name = $v;
-			}
+			return FALSE;
 		}
+
+		$rs_obj = new stdClass();
+		foreach ($rs as $k => $v)
+		{
+			$field_name = odbc_field_name($odbc_result, $k+1);
+			$rs_obj->$field_name = $v;
+		}
+
 		return $rs_obj;
 	}
 
@@ -217,16 +208,18 @@
 	protected function _odbc_fetch_array(& $odbc_result)
 	{
 		$rs = array();
-		$rs_assoc = FALSE;
-		if (odbc_fetch_into($odbc_result, $rs))
+		if ( ! odbc_fetch_into($odbc_result, $rs))
 		{
-			$rs_assoc = array();
-			foreach ($rs as $k => $v)
-			{
-				$field_name = odbc_field_name($odbc_result, $k+1);
-				$rs_assoc[$field_name] = $v;
-			}
+			return FALSE;
 		}
+
+		$rs_assoc = array();
+		foreach ($rs as $k => $v)
+		{
+			$field_name = odbc_field_name($odbc_result, $k+1);
+			$rs_assoc[$field_name] = $v;
+		}
+
 		return $rs_assoc;
 	}
 
diff --git a/system/database/drivers/sqlsrv/sqlsrv_driver.php b/system/database/drivers/sqlsrv/sqlsrv_driver.php
index 961066d..de319b4 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_driver.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_driver.php
@@ -55,7 +55,7 @@
 	 * used for the count_all() and count_all_results() functions.
 	 */
 	protected $_count_string = 'SELECT COUNT(*) AS ';
-	protected $_random_keyword = ' NEWID()'; // not currently supported
+	protected $_random_keyword = ' NEWID()';
 
 	/**
 	 * Non-persistent database connection
@@ -146,13 +146,8 @@
 	 */
 	public function trans_begin($test_mode = FALSE)
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -160,7 +155,7 @@
 		// Reset the transaction failure flag.
 		// If the $test_mode flag is set to TRUE transactions will be rolled back
 		// even if the queries produce a successful result.
-		$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+		$this->_trans_failure = ($test_mode === TRUE);
 
 		return sqlsrv_begin_transaction($this->conn_id);
 	}
@@ -174,13 +169,8 @@
 	 */
 	public function trans_commit()
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -197,13 +187,8 @@
 	 */
 	public function trans_rollback()
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -397,7 +382,7 @@
 	 */
 	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
 	{
-		foreach($values as $key => $val)
+		foreach ($values as $key => $val)
 		{
 			$valstr[] = $key.' = '.$val;
 		}
diff --git a/system/database/drivers/sqlsrv/sqlsrv_forge.php b/system/database/drivers/sqlsrv/sqlsrv_forge.php
index d8b5193..e6f7e1a 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_forge.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_forge.php
@@ -44,7 +44,7 @@
 	 * @param	mixed	primary key(s)
 	 * @param	mixed	key(s)
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
-	 * @return	bool
+	 * @return	string
 	 */
 	protected function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
 	{
@@ -75,26 +75,20 @@
 					$sql .= '('.$attributes['CONSTRAINT'].')';
 				}
 
-				if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
+				if ( ! empty($attributes['UNSIGNED']) && $attributes['UNSIGNED'] === TRUE)
 				{
 					$sql .= ' UNSIGNED';
 				}
 
-				if (array_key_exists('DEFAULT', $attributes))
+				if (isset($attributes['DEFAULT']))
 				{
-					$sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
+					$sql .= " DEFAULT '".$attributes['DEFAULT']."'";
 				}
 
-				if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
-				{
-					$sql .= ' NULL';
-				}
-				else
-				{
-					$sql .= ' NOT NULL';
-				}
+				$sql .= ( ! empty($attributes['NULL']) && $attribues['NULL'] === TRUE)
+					? ' NULL' : ' NOT NULL';
 
-				if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
+				if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE)
 				{
 					$sql .= ' AUTO_INCREMENT';
 				}
@@ -109,22 +103,16 @@
 
 		if (count($primary_keys) > 0)
 		{
-			$primary_keys = $this->db->protect_identifiers($primary_keys);
-			$sql .= ",\n\tPRIMARY KEY (".implode(', ', $primary_keys).')';
+			$sql .= ",\n\tPRIMARY KEY (".implode(', ', $this->db->escape_identifiers($primary_keys)).')';
 		}
 
 		if (is_array($keys) && count($keys) > 0)
 		{
 			foreach ($keys as $key)
 			{
-				if (is_array($key))
-				{
-					$key = $this->db->protect_identifiers($key);
-				}
-				else
-				{
-					$key = array($this->db->protect_identifiers($key));
-				}
+				$key = is_array($key)
+					? $this->db->escape_identifiers($key)
+					: array($this->escape_identifiers($key));
 
 				$sql .= ",\n\tFOREIGN KEY (".implode(', ', $key).')';
 			}
@@ -152,7 +140,7 @@
 	 */
 	protected function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
 	{
-		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name);
+		$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' '.$alter_type.' '.$this->db->escape_identifiers($column_name);
 
 		// DROP has everything it needs now.
 		if ($alter_type === 'DROP')
@@ -160,21 +148,10 @@
 			return $sql;
 		}
 
-		$sql .= ' '.$column_definition;
-
-		if ($default_value !== '')
-		{
-			$sql .= " DEFAULT '".$default_value."'";
-		}
-
-		$sql .= ($null === NULL) ? ' NULL' : ' NOT NULL';
-
-		if ($after_field !== '')
-		{
-			return $sql.' AFTER '.$this->db->protect_identifiers($after_field);
-		}
-
-		return $sql;
+		return $sql.' '.$column_definition
+			.($default_value != '' ? ' DEFAULT "'.$default_value.'"' : '')
+			.($null === NULL ? ' NULL' : ' NOT NULL')
+			.($after_field != '' ? ' AFTER '.$this->db->escape_identifiers($after_field) : '');
 	}
 
 }
diff --git a/system/database/drivers/sqlsrv/sqlsrv_result.php b/system/database/drivers/sqlsrv/sqlsrv_result.php
index 0802677..f802383 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_result.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_result.php
@@ -92,12 +92,12 @@
 		$retval = array();
 		foreach (sqlsrv_field_metadata($this->result_id) as $offset => $field)
 		{
-			$F 				= new stdClass();
-			$F->name 		= $field['Name'];
-			$F->type 		= $field['Type'];
+			$F 		= new stdClass();
+			$F->name 	= $field['Name'];
+			$F->type 	= $field['Type'];
 			$F->max_length	= $field['Size'];
 			$F->primary_key = 0;
-			$F->default		= '';
+			$F->default	= '';
 
 			$retval[] = $F;
 		}
diff --git a/system/database/drivers/sqlsrv/sqlsrv_utility.php b/system/database/drivers/sqlsrv/sqlsrv_utility.php
index 394964b..5a71b16 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_utility.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_utility.php
@@ -41,7 +41,7 @@
 	 * SQLSRV Export
 	 *
 	 * @param	array	Preferences
-	 * @return	mixed
+	 * @return	bool
 	 */
 	protected function _backup($params = array())
 	{
diff --git a/system/language/english/calendar_lang.php b/system/language/english/calendar_lang.php
index 2d477e6..48939d4 100644
--- a/system/language/english/calendar_lang.php
+++ b/system/language/english/calendar_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/date_lang.php b/system/language/english/date_lang.php
index 5335637..38532b7 100644
--- a/system/language/english/date_lang.php
+++ b/system/language/english/date_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/db_lang.php b/system/language/english/db_lang.php
index a135d1a..479cbb1 100644
--- a/system/language/english/db_lang.php
+++ b/system/language/english/db_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/email_lang.php b/system/language/english/email_lang.php
index 23296a2..95a16d1 100644
--- a/system/language/english/email_lang.php
+++ b/system/language/english/email_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/form_validation_lang.php b/system/language/english/form_validation_lang.php
index 6cf0b46..eb4624e 100644
--- a/system/language/english/form_validation_lang.php
+++ b/system/language/english/form_validation_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/ftp_lang.php b/system/language/english/ftp_lang.php
index 4e39e43..d00126b 100644
--- a/system/language/english/ftp_lang.php
+++ b/system/language/english/ftp_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/imglib_lang.php b/system/language/english/imglib_lang.php
index 67ca942..67a36e1 100644
--- a/system/language/english/imglib_lang.php
+++ b/system/language/english/imglib_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/migration_lang.php b/system/language/english/migration_lang.php
index 2085cee..9e3e188 100644
--- a/system/language/english/migration_lang.php
+++ b/system/language/english/migration_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/number_lang.php b/system/language/english/number_lang.php
index 0c19ec6..429c647 100644
--- a/system/language/english/number_lang.php
+++ b/system/language/english/number_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
@@ -25,11 +25,11 @@
  * @filesource
  */
 
-$lang['terabyte_abbr'] = "TB";
-$lang['gigabyte_abbr'] = "GB";
-$lang['megabyte_abbr'] = "MB";
-$lang['kilobyte_abbr'] = "KB";
-$lang['bytes'] = "Bytes";
+$lang['terabyte_abbr'] = 'TB';
+$lang['gigabyte_abbr'] = 'GB';
+$lang['megabyte_abbr'] = 'MB';
+$lang['kilobyte_abbr'] = 'KB';
+$lang['bytes'] = 'Bytes';
 
 /* End of file number_lang.php */
 /* Location: ./system/language/english/number_lang.php */
\ No newline at end of file
diff --git a/system/language/english/profiler_lang.php b/system/language/english/profiler_lang.php
index 11d7912..112527f 100644
--- a/system/language/english/profiler_lang.php
+++ b/system/language/english/profiler_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/unit_test_lang.php b/system/language/english/unit_test_lang.php
index 3a8e144..36e9aca 100644
--- a/system/language/english/unit_test_lang.php
+++ b/system/language/english/unit_test_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/system/language/english/upload_lang.php b/system/language/english/upload_lang.php
index 4fa8394..c3cb9c3 100644
--- a/system/language/english/upload_lang.php
+++ b/system/language/english/upload_lang.php
@@ -5,9 +5,9 @@
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 66da20c..256de95 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -30,9 +30,10 @@
    -  Added support for 3gp, 3g2, mp4, wmv, f4v, vlc Video files to mimes.php.
    -  Added support for m4a, aac, m4u, xspf, au, ac3, flac, ogg Audio files to mimes.php.
    -  Added support for kmz and kml (Google Earth) files to mimes.php.
-   -  Added Romanian and Greek characters in foreign_characters.php
+   -  Added support for ics Calendar files to mimes.php
+   -  Updated support for xml ('application/xml') and xsl ('application/xml', 'text/xsl') files in mimes.php.
    -  Updated support for doc files in mimes.php.
-   -  Added application/xml for xml and application/xml, text/xsl for xsl in mimes.php.
+   -  Added Romanian and Greek characters in foreign_characters.php.
    -  Changed logger to only chmod when file is first created.
    -  Removed previously deprecated SHA1 Library.
    -  Removed previously deprecated use of ``$autoload['core']`` in application/config/autoload.php.