Guido points out that sys.__stdout__ is a bit bucket under IDLE. So keep

the local save/modify/restore of sys.stdout, but add machinery so that
regrtest can tell test_support the value of sys.stdout at the time
regrtest.main() started, and test_support can pass that out later to anyone
who needs a "visible" stdout.

Lib/test/regrtest.py

@@ -85,6 +85,7 @@ def main(tests=None, testdir=None, verbose=0, quiet=0, generate=0,
 
     """
 
+    test_support.record_original_stdout(sys.stdout)
     try:
         opts, args = getopt.getopt(sys.argv[1:], 'hvgqxsrlu:',
                                    ['help', 'verbose', 'quiet', 'generate',