diff -r b6759568b812 Lib/test/test_cmd_line.py
--- a/Lib/test/test_cmd_line.py	Thu Jun 23 21:26:48 2011 -0400
+++ b/Lib/test/test_cmd_line.py	Fri Jun 24 17:40:23 2011 +0200
@@ -259,6 +259,13 @@
             "print(repr(input()))",
             b"'abc'")
 
+    def test_unmached_quote(self):
+        # Issue #10206: python program starting with unmatched quote
+        # spews spaces to stdout
+        rc, out, err = assert_python_failure('-c', "'")
+        self.assert_('SyntaxError' in err.decode('ascii', 'ignore'))
+        self.assertEqual(b'', out) 
+
 
 def test_main():
     test.support.run_unittest(CmdLineTest)