Update pytz to 2019.1

lib/pytz/tests/test_docs.py

@@ -0,0 +1,34 @@
+# -*- coding: ascii -*-
+
+from doctest import DocFileSuite
+import unittest
+import os.path
+import sys
+
+THIS_DIR = os.path.dirname(__file__)
+
+README = os.path.join(THIS_DIR, os.pardir, os.pardir, 'README.txt')
+
+
+class DocumentationTestCase(unittest.TestCase):
+    def test_readme_encoding(self):
+        '''Confirm the README.txt is pure ASCII.'''
+        f = open(README, 'rb')
+        try:
+            f.read().decode('ASCII')
+        finally:
+            f.close()
+
+
+def test_suite():
+    "For the Z3 test runner"
+    return unittest.TestSuite((
+        DocumentationTestCase('test_readme_encoding'),
+        DocFileSuite(os.path.join(os.pardir, os.pardir, 'README.txt'))))
+
+
+if __name__ == '__main__':
+    sys.path.insert(
+        0, os.path.abspath(os.path.join(THIS_DIR, os.pardir, os.pardir))
+    )
+    unittest.main(defaultTest='test_suite')