Issue14929: Stop Idle 3.x from closing on Unicode decode errors when grepping.

Patch by Roger Serwy.

Lib/idlelib/GrepDialog.py

@@ -81,7 +81,7 @@ class GrepDialog(SearchDialogBase):
         hits = 0
         for fn in list:
             try:
-                f = open(fn)
+                f = open(fn, errors='replace')
             except IOError as msg:
                 print(msg)
                 continue

Misc/NEWS

@@ -67,6 +67,9 @@ Core and Builtins
 Library
 -------
 
+- Issue14929: Stop Idle 3.x from closing on Unicode decode errors when grepping.
+  Patch by Roger Serwy.
+
 - Issue12510: Attempting to get invalid tooltip no longer closes Idle.
   Original patch by Roger Serwy.