Fixed #1885: --formats=tar,gztar was not working properly in the sdist command
diff --git a/Lib/distutils/command/sdist.py b/Lib/distutils/command/sdist.py
index 6ce8c43..e8b6bce 100644
--- a/Lib/distutils/command/sdist.py
+++ b/Lib/distutils/command/sdist.py
@@ -456,6 +456,10 @@
 
         self.make_release_tree(base_dir, self.filelist.files)
         archive_files = []              # remember names of files we create
+        # tar archive must be created last to avoid overwrite and remove
+        if 'tar' in self.formats:
+            self.formats.append(self.formats.pop(self.formats.index('tar')))
+
         for fmt in self.formats:
             file = self.make_archive(base_name, fmt, base_dir=base_dir)
             archive_files.append(file)