unbind accepts several event types

[PhiLhoSoft]

I read the unbind documentation. I use unbind instead of off, because I work on a legacy project.
Anyway, I see the bind doc defines eventType as "A string containing one or more DOM event types", while unbind defines it as "A string containing a JavaScript event type".
So it is unclear if we can specify several event types in unbind.
I tried the example of the page, adding mouseenter to click, and it worked.
So I suggest to update the doc to reflect this fact. Or to openly discourage this practice, if it is frowned upon... (but parameterless unbind is "worse", so...)

Note: previously reported at jquery/jquery.com#146

[AurelioDeRosa]

The issue reported is correct. I'm going to submit a PR to address it.