Merge 3.2: issue #14937.

diff --cc Lib/idlelib/NEWS.txt
index b28e58ad3323839f792fbc5f8b0d5ae3c88f0853,334b0c2d97dea0dc9ddec2c798bde3ca6cbb26b2..7ea53db2472366b6f404bb606eb2990216c93e41
--- 1/Lib/idlelib/NEWS.txt
--- 2/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@@ -1,10 -1,11 +1,13 @@@
- What's New in IDLE 3.3?
 -What's New in IDLE 3.2.4?
++What's New in IDLE 3.3.0?
  =========================
  
 -What's New in IDLE 3.2.3?
 -=========================
+ - Issue #14937: Perform auto-completion of filenames in strings even for
+   non-ASCII filenames.
+ 
 +- Issue #8515: Set __file__ when run file in IDLE.
 +  Initial patch by Bruce Frederiksen.
 +
 +- IDLE can be launched as `python -m idlelib`
  
  - Issue #14409: IDLE now properly executes commands in the Shell window
    when it cannot read the normal config files on startup and