[ci skip] Add return types to helper docs (+ some other formatting)
diff --git a/user_guide_src/source/helpers/number_helper.rst b/user_guide_src/source/helpers/number_helper.rst
index 5a3d72b..2de4457 100644
--- a/user_guide_src/source/helpers/number_helper.rst
+++ b/user_guide_src/source/helpers/number_helper.rst
@@ -29,7 +29,8 @@
 
 	:param	mixed	$num: Number of bytes
 	:param	int	$precision: Floating point precision
-	:returns:	string
+	:returns:	Formatted data size string
+	:rtype:	string
 
 	Formats numbers as bytes, based on size, and adds the appropriate
 	suffix. Examples::
@@ -48,4 +49,4 @@
 		 echo byte_format(45678, 2); // Returns 44.61 KB
 
 	.. note:: The text generated by this function is found in the following
-		language file: `language/<your_lang>/number_lang.php`
\ No newline at end of file
+		language file: *language/<your_lang>/number_lang.php*
\ No newline at end of file