Issue #12678: Fix distutils sdist test on Windows.

Patch by Jeremy Kloth.
diff --git a/Lib/distutils/tests/test_sdist.py b/Lib/distutils/tests/test_sdist.py
index 440af98..f34f786 100644
--- a/Lib/distutils/tests/test_sdist.py
+++ b/Lib/distutils/tests/test_sdist.py
@@ -365,6 +365,7 @@
     def test_manual_manifest(self):
         # check that a MANIFEST without a marker is left alone
         dist, cmd = self.get_cmd()
+        cmd.formats = ['gztar']
         cmd.ensure_finalized()
         self.write_file((self.tmp_dir, cmd.manifest), 'README.manual')
         self.write_file((self.tmp_dir, 'README.manual'),
diff --git a/Misc/ACKS b/Misc/ACKS
index d345e54..6f7d9d1 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -484,6 +484,7 @@
 Bastian Kleineidam
 Bob Kline
 Matthias Klose
+Jeremy Kloth
 Kim Knapp
 Lenny Kneler
 Pat Knight