Fix minor typo in `patch` documentation

[kbressem]

While reading the docs of patch_to and patch I found a minor typo:

# we initilized `t` to a type int = 1 which I have changed to # we initialized `t` to a type int = 1

# this sets self.g = 'helllo 'which was changed to # this sets self.g = 'hello '

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[jph00]

Thanks!