It seems that the task description or test may be incorrect or unclear.
The regular expression "\b(\w+)\s\1\b" matches two consecutive instances of the same word separated by a single whitespace character (\s), but it does not actually find all duplicates in the string.
It seems that the task description or test may be incorrect or unclear.
The regular expression "\b(\w+)\s\1\b" matches two consecutive instances of the same word separated by a single whitespace character (\s), but it does not actually find all duplicates in the string.