testsuite: fix typo (fixes https://trac.osgeo.org/grass/ticket/3776)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@74159 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/python/gunittest/testsuite/data/samplecode/testsuite/test_python_unittest.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __furute__ import print_function
+from __future__ import print_function
 from unittest import TestCase, main