bpo-40181: Remove '/' reminder in IDLE calltips. (GH-22350)


The marker was added to the language in 3.8 and
3.7 only gets security patches.
(cherry picked from commit 40a0625792e795cd41c4ba20475e3b770b53817a)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index fd76207..f8ec6ab 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,9 @@
 ======================================
 
 
+bpo-40181: In calltips, stop reminding that '/' marks the end of
+positional-only arguments.
+
 bpo-41468: Improve IDLE run crash error message (which users should
 never see).