When should end punctuation go inside quotes?
From a AMS blog post:
Some organizations have temporarily suspended their polling, and with the news media tabbing Sandy as the new “it girl,” the presidential candidates were sent to the fourth estate’s back burner, at least for a few days, as notedby media reporter Howard Kurtz
Why is the comma inside the quotation marks in “it girl,”? This occurs not only in this example, but is a general rule, not even limited to English. But I find it strange: the comma clearly not part of the name; nor is it part of the quotation in e.g. “wait a second,” said my friend as opposed to “wait a second”, said my friend.
What is the grammatical word for the comma being placed inside the quotation marks, and why is it like this?