Chapter 4: Patterns (part 2) - Tree Paterns

Hi,
In the lecture about tree pattens (Chapter 4: Patterns (Part 2) - Tree Patterns) at 05:24

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I think the first comment should be “immediate child of Y”

The second comment should be “descends from X and Y” and it seems like the regex misses “\.” before “Y”

Thanks,
Rafael,