Merge pull request #4603 from rochefort/fix-type

[ci skip] Fix a parameter type in url_title() docs
diff --git a/user_guide_src/source/helpers/url_helper.rst b/user_guide_src/source/helpers/url_helper.rst
index 64deae2..6fb0dd9 100644
--- a/user_guide_src/source/helpers/url_helper.rst
+++ b/user_guide_src/source/helpers/url_helper.rst
@@ -277,7 +277,7 @@
 
 	:param	string	$str: Input string
 	:param	string	$separator: Word separator
-	:param	string	$lowercase: Whether to transform the output string to lower-case
+	:param	bool	$lowercase: Whether to transform the output string to lower-case
 	:returns:	URL-formatted string
 	:rtype:	string
 
@@ -370,4 +370,4 @@
 		will *automatically* be selected when the page is currently accessed
 		via POST and HTTP/1.1 is used.
 
-	.. important:: This function will terminate script execution.
\ No newline at end of file
+	.. important:: This function will terminate script execution.