9.Mutation Typo found

[Payuing]

Second example

foo = ['hi']
print(foo)
# Output: ['hi']

bar = foo
bar += ['bye']

print(foo)
# Output: ['hi'] 
***#THE OUTPUT HERE SHOULD BE ['hi', 'bye']***

print(bar)
# Output: ['hi', 'bye']

[lancelote]

Hi @Payuing ! It's an intentionally wrong example to illustrate the wrong intuition one can have there, check the text above the code:

We were expecting something like this: