Fix style errors.

dulwich/ignore.py

@@ -96,7 +96,7 @@ def translate(pat):
     if not pat.endswith(b'/'):
         res += b'/?'
 
-    return res + b'\Z'
+    return res + b'\\Z'
 
 
 def read_ignore_patterns(f):

dulwich/tests/compat/test_pack.py

@@ -46,7 +46,7 @@ from dulwich.tests.compat.utils import (
     run_git_or_fail,
     )
 
-_NON_DELTA_RE = re.compile(b'non delta: (?P<non_delta>\d+) objects')
+_NON_DELTA_RE = re.compile(b'non delta: (?P<non_delta>\\d+) objects')
 
 
 def _git_verify_pack_object_list(output):

dulwich/tests/test_diff_tree.py

@@ -725,8 +725,8 @@ class RenameDetectionTest(DiffTestCase):
     def test_content_rename_one_to_one(self):
         b11 = make_object(Blob, data=b'a\nb\nc\nd\n')
         b12 = make_object(Blob, data=b'a\nb\nc\ne\n')
-        b21 = make_object(Blob, data=b'e\nf\ng\n\h')
-        b22 = make_object(Blob, data=b'e\nf\ng\n\i')
+        b21 = make_object(Blob, data=b'e\nf\ng\n\nh')
+        b22 = make_object(Blob, data=b'e\nf\ng\n\ni')
         tree1 = self.commit_tree([(b'a', b11), (b'b', b21)])
         tree2 = self.commit_tree([(b'c', b12), (b'd', b22)])
         self.assertEqual(

dulwich/tests/test_ignore.py

@@ -106,10 +106,10 @@ class ReadIgnorePatterns(TestCase):
 
 # and an empty line:
 
-\#not a comment
+\\#not a comment
 !negative
 with trailing whitespace 
-with escaped trailing whitespace\ 
+with escaped trailing whitespace\\ 
 """)  # noqa: W291
         self.assertEqual(list(read_ignore_patterns(f)), [
             b'\\#not a comment',