Note that inside a character class, a period is not special: it means just period. So this: 

/[\w\s.]+/

[download]
would match one or more of (word chars, space chars, periods) in any combination.

In other words, your first two examples are equivalent, not your second two.

In reply to Re^4: utf weirdness in regex by kelan
in thread utf weirdness in regex by december

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