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 8da6fe4..42faa5d 100644
--- a/Lib/distutils/tests/test_sdist.py
+++ b/Lib/distutils/tests/test_sdist.py
@@ -351,6 +351,7 @@
         # filling data_files by pointing files in package_data
         dist.package_data = {'somecode': ['*.txt']}
         self.write_file((self.tmp_dir, 'somecode', 'doc.txt'), '#')
+        cmd.formats = ['gztar']
         cmd.ensure_finalized()
         cmd.run()
 
diff --git a/Misc/ACKS b/Misc/ACKS
index a04b637..cdae287 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -447,6 +447,7 @@
 Bastian Kleineidam
 Bob Kline
 Matthias Klose
+Jeremy Kloth
 Kim Knapp
 Lenny Kneler
 Pat Knight