Some formatting fixes.

dulwich/file.py

@@ -30,6 +30,7 @@ def ensure_dir_exists(dirname):
         if e.errno != errno.EEXIST:
             raise
 
+
 def fancy_rename(oldname, newname):
     """Rename file with temporary backup file to rollback if rename fails"""
     if not os.path.exists(newname):

dulwich/object_store.py

@@ -183,7 +183,7 @@ class BaseObjectStore(object):
 
         :param tree_id: SHA1 of the tree.
         :param include_trees: If True, include tree objects in the iteration.
-        :yield: Tuples of (path, mode, hexhsa) for objects in a tree.
+        :return: Yields tuples of (path, mode, hexhsa) for objects in a tree.
         """
         todo = [('', stat.S_IFDIR, tree_id)]
         while todo:

dulwich/protocol.py

@@ -143,7 +143,7 @@ class Protocol(object):
     def read_pkt_seq(self):
         """Read a sequence of pkt-lines from the remote git process.
 
-        :yield: Each line of data up to but not including the next flush-pkt.
+        :return: Yields each line of data up to but not including the next flush-pkt.
         """
         pkt = self.read_pkt_line()
         while pkt:

dulwich/repo.py

@@ -51,7 +51,6 @@ from dulwich.objects import (
     Tag,
     Tree,
     hex_to_sha,
-    object_class,
     )
 import warnings