Issue #18873: IDLE, 2to3, and the findnocoding.py script now detect Python
source code encoding only in comment lines.
diff --git a/Misc/NEWS b/Misc/NEWS
index d9b413d..7f4ef60 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -183,6 +183,9 @@
 Tools/Demos
 -----------
 
+- Issue #18873: 2to3 and the findnocoding.py script now detect Python source
+  code encoding only in comment lines.
+
 - Issue #18817: Fix a resource warning in Lib/aifc.py demo.
 
 - Issue #18439: Make patchcheck work on Windows for ACKS, NEWS.
@@ -207,6 +210,9 @@
 IDLE
 ----
 
+- Issue #18873: IDLE now detects Python source code encoding only in comment
+  lines.
+
 - Issue #18988: The "Tab" key now works when a word is already autocompleted.
 
 - Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster.