Fix change_type

For copy and rename we can have the score with the letter

Author: LeResKP

git/diff.py

@@ -471,6 +471,11 @@ def handle_diff_line(line):
 
             meta, _, path = line[1:].partition('\t')
             old_mode, new_mode, a_blob_id, b_blob_id, change_type = meta.split(None, 4)
+            # Change type can be R100
+            # R: status letter
+            # 100: score (in case of copy and rename)
+            change_type = change_type[0]
+            score = ''.join(change_type[1:]) or None
             path = path.strip()
             a_path = path.encode(defenc)
             b_path = path.encode(defenc)

git/test/test_diff.py

@@ -108,6 +108,7 @@ def test_diff_with_rename(self):
         self.assertIsNotNone(diff.renamed)
         self.assertEqual(diff.rename_from, 'this')
         self.assertEqual(diff.rename_to, 'that')
+        self.assertEqual(diff.change_type, 'R')
         self.assertEqual(len(list(diffs.iter_change_type('R'))), 1)
 
     def test_diff_of_modified_files_not_added_to_the_index(self):