Did I write the regular expression correctly to remove the space before the punctuation mark?

Question

Python

Example:
a Greek was driving across a river. sees a Greek in the river cancer? put the hand of the Greek into the river, cancer by the hand of the Greek tsap!
Need to:
rode a Greek across the river. sees a Greek in the river rak? put the hand of the Greek into the river, cancer by the hand of the Greek tsap!

I wrote this: Do you think it's okay? How else can you?
re.sub("[^(\S)](?=[\.,?!])", r"\1", text)

Answer 1

re.sub("\s(?=[.,?!])", "", text)
Or
re.sub("\s([.,?!])", r"\1", text)