Add IDLE NEWS items for 3.7 (#2090)

Misc/NEWS

@@ -1078,6 +1078,22 @@ Library
   sys.getrecursionlimit() times, to protect against objects which create a new
   object on every attribute access.
 
+IDLE
+----
+
+- bpo-30290: Help-about: use pep8 names and add tests.
+  Increase coverage to 100%.
+  Patches by Louie Lu, Cheryl Sabella, and Terry Jan Reedy.
+
+- bpo-30303: Add _utest option to textview; add new tests.
+  Increase coverage to 100%.
+  Patches by Louie Lu and Terry Jan Reedy.
+
+- Issue #29071: IDLE colors f-string prefixes (but not invalid ur prefixes).
+
+- Issue #28572: Add 10% to coverage of IDLE's test_configdialog.
+  Update and augment description of the configuration system.
+
 Windows
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