:checkbox, :password and other selectors have innacurate documentation

By checking http://api.jquery.com/checkbox-selector/ (and others similarly) we are told that

$( ":checkbox" ) is equivalent to $( "[type=checkbox]" ). (...)

But that is false:

$('<span type="checkbox"></span>').is(":checkbox") // yields false
$('<span type="checkbox"></span>').is("[type=checkbox]") // yields true

I know that usually that attribute is used in <input> elements, but that does not make the documentation statement true.

Start with the checkbox selector documentation at api.jquery.com/checkbox-selector/ and inspect the similarly documented :password and other selectors mentioned in the issue. Compare each stated equivalence with the supplied jQuery examples, then update inaccurate wording and verify that the documentation matches the selector behavior.