add blanklines

Author: johnzhou721

Lib/idlelib/News3.txt

@@ -3,6 +3,7 @@ What's New in IDLE 3.15.0
 Released on 2026-10-01
 =========================
 
+
 gh-134873: Minor code modernization in extension loader.
 Patch by johnzhou721, Zachary Ware, and Terry J. Reedy.
 
@@ -12,6 +13,7 @@ What's New in IDLE 3.14.0
 Released on 2025-10-07
 =========================
 
+
 gh-112936: IDLE - Include Shell menu in single-process mode,
 though with Restart Shell and View Last Restart disabled.
 Patch by Zhikang Yan.