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+++ b/NEWS
@@ -20,6 +20,10 @@ with all sufficient information, see the ChangeLog file or Redmine
 
 === Core classes updates (outstanding ones only)
 
+* Integer
+
+  * Integer.sqrt  [Feature #13219]
+
 * Regexp
   * Update Onigmo 6.1.1.
     * Support absent operator https://github.com/k-takata/Onigmo/issues/82