Rename Red Knot (#17820)

crates/ty_python_semantic/resources/mdtest/exception/except_star.md

@@ -0,0 +1,63 @@
+# `except*`
+
+`except*` is only available in Python 3.11 and later:
+
+```toml
+[environment]
+python-version = "3.11"
+```
+
+## `except*` with `BaseException`
+
+```py
+try:
+    help()
+except* BaseException as e:
+    reveal_type(e)  # revealed: BaseExceptionGroup[BaseException]
+```
+
+## `except*` with specific exception
+
+```py
+try:
+    help()
+except* OSError as e:
+    # TODO: more precise would be `ExceptionGroup[OSError]` --Alex
+    # (needs homogeneous tuples + generics)
+    reveal_type(e)  # revealed: BaseExceptionGroup[BaseException]
+```
+
+## `except*` with multiple exceptions
+
+```py
+try:
+    help()
+except* (TypeError, AttributeError) as e:
+    # TODO: more precise would be `ExceptionGroup[TypeError | AttributeError]` --Alex
+    # (needs homogeneous tuples + generics)
+    reveal_type(e)  # revealed: BaseExceptionGroup[BaseException]
+```
+
+## `except*` with mix of `Exception`s and `BaseException`s
+
+```py
+try:
+    help()
+except* (KeyboardInterrupt, AttributeError) as e:
+    # TODO: more precise would be `BaseExceptionGroup[KeyboardInterrupt | AttributeError]` --Alex
+    reveal_type(e)  # revealed: BaseExceptionGroup[BaseException]
+```
+
+## Invalid `except*` handlers
+
+```py
+try:
+    help()
+except* 3 as e:  # error: [invalid-exception-caught]
+    reveal_type(e)  # revealed: BaseExceptionGroup[BaseException]
+
+try:
+    help()
+except* (AttributeError, 42) as e:  # error: [invalid-exception-caught]
+    reveal_type(e)  # revealed: BaseExceptionGroup[BaseException]
+```