Wrong type hint for self.stack in class TypingCollector in docs/source/tutorial.ipynb

[tkmeyer]

In docs/source/tutorial.ipynb

the type hint for the self.stack attribute of class TypingCollector is wrong and should read

class TypingCollector(cst.CSTVisitor):
    def __init__(self):
        # stack for storing the canonical name of the current function
        self.stack: List[str] = []
   ...

instead of

class TypingCollector(cst.CSTVisitor):
    def __init__(self):
        # stack for storing the canonical name of the current function
        self.stack: List[Tuple[str, ...]] = [] # wrong type hint
   ...

because the only assignment to self.stack in the example is

...
      self.stack.append(node.name.value)
...

and node.name.value is a str, not a Tuple.
The error will also be flagged by pyright or mypy.

The same applys to class TypingTransformer in the same file.