jshint/jshint — pull request #1003 by Stuk (2013-04-10 21:39:16+00:00)
Title: Unignore warnings with +W...

Add support for +W### option in comments to unignore an warning

Allows a warning to be ignored for a number of lines, and then
unignored after. For example:

var y = Object.create(null);
// ...

//jshint -W089
for (var x in y) {
// ...
}
//jshint +W089

suppresses the warning about not wrapping a "for in" in an if in this
case, but leaves the warning enabled for later occurrences in the
file.