MailParser timezone parsing patch

timezone.patch

diff --git mailparser/utils.py mailparser/utils.py
index f44139c..797f218 100644
--- mailparser/utils.py
+++ mailparser/utils.py
@@ -345,7 +345,7 @@ def convert_mail_date(date):
     log.debug("Date parsed in timestamp: {!r}".format(t))
     date_utc = datetime.datetime.utcfromtimestamp(t)
     timezone = d[9] / 3600 if d[9] else 0
-    timezone = "{:+.0f}".format(timezone)
+    timezone = "{:+.2f}".format(timezone)
     return date_utc, timezone
 
 
diff --git tests/test_mail_parser.py tests/test_mail_parser.py
index a0abd5a..dd17c9f 100644
--- tests/test_mail_parser.py
+++ tests/test_mail_parser.py
@@ -495,7 +495,7 @@ class TestMailParser(unittest.TestCase):
         self.assertIsInstance(result, list)
 
         result = mail.timezone
-        self.assertEqual(result, "+1")
+        self.assertEqual(result, "+1.00")
 
     def test_get_to_domains(self):
         m = mailparser.parse_from_file(mail_test_6)
@@ -514,11 +514,15 @@ class TestMailParser(unittest.TestCase):
     def test_convert_mail_date(self):
         s = "Mon, 20 Mar 2017 05:12:54 +0600"
         d, t = convert_mail_date(s)
-        self.assertEqual(t, "+6")
+        self.assertEqual(t, "+6.00")
         self.assertEqual(str(d), "2017-03-19 23:12:54")
         s = "Mon, 20 Mar 2017 05:12:54 -0600"
         d, t = convert_mail_date(s)
-        self.assertEqual(t, "-6")
+        self.assertEqual(t, "-6.00")
+        s = "Mon, 11 Dec 2017 15:27:44 +0530"
+        d, t = convert_mail_date(s)
+        self.assertEqual(str(d), "2017-12-11 09:57:44")
+        self.assertEqual(t, "+5.50")
 
     def test_ported_string(self):
         raw_data = ""