[clang] [libclang/python] Fix some type errors, add type annotations (PR #98745)

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darker --check --diff -r 1bad7024561bc64ed4bfda0772b16376b475eba5...06483bd3e398dd9dba757904e622d5dd1b37db77 clang/bindings/python/clang/cindex.py clang/bindings/python/tests/cindex/test_code_completion.py clang/bindings/python/tests/cindex/test_comment.py
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``````````diff
--- clang/cindex.py	2024-07-13 13:12:34.000000 +0000
+++ clang/cindex.py	2024-07-13 13:21:02.416533 +0000
@@ -93,12 +93,15 @@
     CObjP: TypeAlias = _Pointer[Any]
 
     TSeq = TypeVar("TSeq", covariant=True)
 
     class NoSliceSequence(Protocol[TSeq]):
-        def __len__(self) -> int: ...
-        def __getitem__(self, key: int) -> TSeq: ...
+        def __len__(self) -> int:
+            ...
+
+        def __getitem__(self, key: int) -> TSeq:
+            ...
 
 
 # Python 3 strings are unicode, translate them to/from utf8 for C-interop.
 class c_interop_string(c_char_p):
     def __init__(self, p: str | bytes | None = None):

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https://github.com/llvm/llvm-project/pull/98745