Merge pull request #4291 from b-kaxa/fix-phpdoc

[ci skip] phpdoc adjustments in CI_Router and CI_URI
diff --git a/system/core/URI.php b/system/core/URI.php
index 5b658f6..5179b40 100644
--- a/system/core/URI.php
+++ b/system/core/URI.php
@@ -294,7 +294,7 @@
 	 *
 	 * Do some final cleaning of the URI and return it, currently only used in self::_parse_request_uri()
 	 *
-	 * @param	string	$url
+	 * @param	string	$uri
 	 * @return	string
 	 */
 	protected function _remove_relative_directory($uri)