http://www.w3.org/TR/css3-text/#hanging-punctuation

“This is a paragraph ([#p01]) with a leading quotation mark. It should hang off the beginning of the first line of text such that the non-quotation characters line up with each other vertically.”

“This is a paragraph ([#p02]) with a trailing quotation mark. It should hang off the end of the last line in order to avoid forced line-wrapping.”