Merge pull request #2861 from iolufemi/develop

Fixed Typo in String Helper function
diff --git a/system/helpers/string_helper.php b/system/helpers/string_helper.php
index 12f818f..4be7f29 100644
--- a/system/helpers/string_helper.php
+++ b/system/helpers/string_helper.php
@@ -188,7 +188,7 @@
 	 *
 	 * Useful for generating passwords or hashes.
 	 *
-	 * @param	string	type of random string.  basic, alpha, alunum, numeric, nozero, unique, md5, encrypt and sha1
+	 * @param	string	type of random string.  basic, alpha, alnum, numeric, nozero, unique, md5, encrypt and sha1
 	 * @param	int	number of characters
 	 * @return	string
 	 */