Fix regex to support empty email addresses i.e. 'name <>'

Fixes gitpython-developers#833

Author: Sebastian Thiel

git/test/test_util.py

@@ -212,6 +212,11 @@ def test_actor(self):
             self.assertIsInstance(Actor.author(cr), Actor)
         # END assure config reader is handled
 
+    def test_actor_from_string(self):
+        self.assertEqual(Actor._from_string("name"), Actor("name", None))
+        self.assertEqual(Actor._from_string("name <>"), Actor("name", ""))
+        self.assertEqual(Actor._from_string("name last another <some-very-long-email@example.com>"), Actor("name last another", "some-very-long-email@example.com"))
+
     @ddt.data(('name', ''), ('name', 'prefix_'))
     def test_iterable_list(self, case):
         name, prefix = case

git/util.py

@@ -534,8 +534,8 @@ class Actor(object):
     can be committers and authors or anything with a name and an email as
     mentioned in the git log entries."""
     # PRECOMPILED REGEX
-    name_only_regex = re.compile(r'<(.+)>')
-    name_email_regex = re.compile(r'(.*) <(.+?)>')
+    name_only_regex = re.compile(r'<(.*)>')
+    name_email_regex = re.compile(r'(.*) <(.*?)>')
 
     # ENVIRONMENT VARIABLES
     # read when creating new commits