commit - fddeca05f88e0ebc397a2122bfa3c1eb77ca38a2
commit + bc10bc8f2bfb5bfb2a68b8c0ec1ea71863e6b4a7
blob - 81feb78ee5f3402d748c351071d28da3886741c9
blob + 19f540e69893a800afb90122765f0e02d003faf1
--- dulwich/client.py
+++ dulwich/client.py
@@ -2285,7 +2285,6 @@ def iter_instead_of(config: Config, push: bool = False
             except KeyError:
                 pass
         for needle in needles:
-            assert isinstance(needle, bytes)
             yield needle.decode('utf-8'), replacement.decode('utf-8')
 
 
blob - d9dac555bef8dd3f0597019a1921987700f8b34b
blob + e52d468e3bc66f6fa295218061a2656e207ac800
--- dulwich/config.py
+++ dulwich/config.py
@@ -199,8 +199,6 @@ class Config(object):
             value = self.get(section, name)
         except KeyError:
             return default
-        if isinstance(value, bool):
-            return value
         if value.lower() == b"true":
             return True
         elif value.lower() == b"false":
@@ -401,7 +399,7 @@ class ConfigDict(Config, MutableMapping[Section, Mutab
         return self._values.keys()
 
 
-def _format_string(value):
+def _format_string(value: bytes) -> bytes:
     if (
         value.startswith(b" ")
         or value.startswith(b"\t")
@@ -618,12 +616,7 @@ class ConfigFile(ConfigDict):
             else:
                 f.write(b"[" + section_name + b' "' + subsection_name + b'"]\n')
             for key, value in values.items():
-                if value is True:
-                    value = b"true"
-                elif value is False:
-                    value = b"false"
-                else:
-                    value = _format_string(value)
+                value = _format_string(value)
                 f.write(b"\t" + key + b" = " + value + b"\n")