tests: lexicographical imports in silenttestrunner.py

tests/silenttestrunner.py

@@ -1,24 +1,24 b''
 from __future__ import absolute_import, print_function
+import os
+import sys
 import unittest
-import sys
-import os
 
 def main(modulename):
     '''run the tests found in module, printing nothing when all tests pass'''
     module = sys.modules[modulename]
     suite = unittest.defaultTestLoader.loadTestsFromModule(module)
     results = unittest.TestResult()
     suite.run(results)
     if results.errors or results.failures:
         for tc, exc in results.errors:
             print('ERROR:', tc)
             print()
             sys.stdout.write(exc)
         for tc, exc in results.failures:
             print('FAIL:', tc)
             print()
             sys.stdout.write(exc)
         sys.exit(1)
 
 if os.environ.get('SILENT_BE_NOISY'):
     main = unittest.main