According to http://www.w3.org/TR/html5/common-input-element-attributes.html#the-placeholder-attribute ,
"User agents should present this hint to the user, after having stripped line
breaks from it, when the element's value is the empty string and the control
is not focused (e.g. by displaying it inside a blank unfocused control)." Whereas
"For a longer hint or other advisory text, the title attribute is more appropriate."
