stdlib: add a few more defaults (#14618)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

stdlib/configparser.pyi

@@ -449,10 +449,13 @@ class ParsingError(Error):
         def __init__(self, source: str) -> None: ...
     else:
         @overload
-        def __init__(self, source: str, filename: None = None) -> None: ...
+        def __init__(self, source: str) -> None: ...
         @overload
         @deprecated("The `filename` parameter removed in Python 3.12. Use `source` instead.")
-        def __init__(self, source: None = None, filename: str = ...) -> None: ...
+        def __init__(self, source: None, filename: str | None) -> None: ...
+        @overload
+        @deprecated("The `filename` parameter removed in Python 3.12. Use `source` instead.")
+        def __init__(self, source: None = None, *, filename: str | None) -> None: ...
 
     def append(self, lineno: int, line: str) -> None: ...
 

stdlib/lib2to3/fixes/fix_tuple_params.pyi

@@ -1,4 +1,3 @@
-from _typeshed import Incomplete
 from typing import ClassVar, Literal
 
 from .. import fixer_base
@@ -13,5 +12,5 @@ class FixTupleParams(fixer_base.BaseFix):
 
 def simplify_args(node): ...
 def find_params(node): ...
-def map_to_index(param_list, prefix=..., d: Incomplete | None = ...): ...
+def map_to_index(param_list, prefix=[], d=None): ...
 def tuple_name(param_list): ...

stdlib/os/__init__.pyi

@@ -1197,7 +1197,7 @@ if sys.platform != "win32":
 
 def getcwd() -> str: ...
 def getcwdb() -> bytes: ...
-def chmod(path: FileDescriptorOrPath, mode: int, *, dir_fd: int | None = None, follow_symlinks: bool = ...) -> None: ...
+def chmod(path: FileDescriptorOrPath, mode: int, *, dir_fd: int | None = None, follow_symlinks: bool = True) -> None: ...
 
 if sys.platform != "win32" and sys.platform != "linux":
     def chflags(path: StrOrBytesPath, flags: int, follow_symlinks: bool = True) -> None: ...  # some flavors of Unix