bug#10783: Some built-in functionslost their argument names

[Glenn Morris]

Stefan Monnier wrote:

> Just for the record: such duplicate definitions should be removed.
> E.g. the C and pc-win.el definitions should be refactored such that
> there is only one C definition (which might call an Elisp implementation
> in the MS-DOS case).

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4402 :)

Obviously for 24.1 we can keep papering over it by syncing up all the
various docs, and doing something about this arglist issue.