Issue #10117: Tools/scripts/reindent.py now accepts source files that

use encoding other than ASCII or UTF-8.  Source encoding is preserved
when reindented code is written to a file.

Lib/trace.py

@@ -493,6 +493,7 @@ class Trace:
             threading.settrace(self.globaltrace)
             sys.settrace(self.globaltrace)
         try:
+            del sys.modules['pickle']
             exec(cmd, globals, locals)
         finally:
             if not self.donothing: