How does Stack Overflow display tooltip for the questions?

tooltip

Solution

It is just a title attribute on the hyperlink, plain and simple.

<a href="..." title="The value is approximately
        3.14159265
    but for simplicity you can always round it
    to exactly 3.0">What is the value of Pi?</a>

In IE, Chrome & Safari, it honors the line breaks a bit more strictly than say Firefox or Opera.

Problem

While we ask a question, SO shows related questions. If we hover on the questions the content is displayed as a tooltip which contains linebreaks, indentations etc. What technique SO uses for it? How to display tooltips wit the formatting? Other than, jquery/javascript is there any simple way to achieve it? Was just wondering, should i ask this on Meta?

Original source