Big diff: use lower-case list and dict (#5888)

stdlib/io.pyi

@@ -4,7 +4,7 @@ import sys
 from _typeshed import ReadableBuffer, Self, StrOrBytesPath, WriteableBuffer
 from os import _Opener
 from types import TracebackType
-from typing import IO, Any, BinaryIO, Callable, Iterable, Iterator, List, TextIO, Tuple, Type
+from typing import IO, Any, BinaryIO, Callable, Iterable, Iterator, TextIO, Tuple, Type
 
 DEFAULT_BUFFER_SIZE: int
 
@@ -34,7 +34,7 @@ class IOBase:
     def isatty(self) -> bool: ...
     def readable(self) -> bool: ...
     read: Callable[..., Any]
-    def readlines(self, __hint: int = ...) -> List[bytes]: ...
+    def readlines(self, __hint: int = ...) -> list[bytes]: ...
     def seek(self, __offset: int, __whence: int = ...) -> int: ...
     def seekable(self) -> bool: ...
     def tell(self) -> int: ...
@@ -126,7 +126,7 @@ class TextIOBase(IOBase):
     def write(self, __s: str) -> int: ...
     def writelines(self, __lines: Iterable[str]) -> None: ...  # type: ignore
     def readline(self, __size: int = ...) -> str: ...  # type: ignore
-    def readlines(self, __hint: int = ...) -> List[str]: ...  # type: ignore
+    def readlines(self, __hint: int = ...) -> list[str]: ...  # type: ignore
     def read(self, __size: int | None = ...) -> str: ...
     def tell(self) -> int: ...
 
@@ -164,7 +164,7 @@ class TextIOWrapper(TextIOBase, TextIO):
     def __next__(self) -> str: ...  # type: ignore
     def writelines(self, __lines: Iterable[str]) -> None: ...  # type: ignore
     def readline(self, __size: int = ...) -> str: ...  # type: ignore
-    def readlines(self, __hint: int = ...) -> List[str]: ...  # type: ignore
+    def readlines(self, __hint: int = ...) -> list[str]: ...  # type: ignore
     def seek(self, __cookie: int, __whence: int = ...) -> int: ...
 
 class StringIO(TextIOWrapper):