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I'm adding the brazilian phone format. The problem is that the format may change among the states (and cities), including an extra number.
It may look like this:
+55 (..) ....-....
Or like this: like this:
+55 (..) .....-....
I decided to add another string match for optional numbers, to be set only when all the dots are already fulfilled, and named it "?".
Also I think the length of the input should not be longer than the format specifies (don't know if this is a general case though), so I removed the possibility for the formatted number to outgrow the specification.
I also changed the default validity function to check the format after it the input has been clicked.