Index: src/wp-includes/category-template.php
===================================================================
--- src/wp-includes/category-template.php	(revision 39621)
+++ src/wp-includes/category-template.php	(working copy)
@@ -718,10 +718,12 @@
 }
 
 /**
- * Default topic count scaling for tag links
+ * Default topic count scaling for tag links.
  *
- * @param int $count number of posts with that tag
- * @return int scaled count
+ * @since 2.9.0
+ *
+ * @param int $count Number of posts with that tag.
+ * @return int Scaled count.
  */
 function default_topic_count_scale( $count ) {
 	return round(log10($count + 1) * 100);