Re: C-u prefix behavior of TAB broken

[Richard Stallman]

I cleaned up the confusion in c-indent-line-or-region.

I also made `region-active-p' do the same thing it does in XEmacs.
The function to check whether a command should operate on the region
instead of whatever it normally does
is now called `use-region-p'.

I fixed several files whose behavior might have been affected
by the fact that `region-active-p' is now defined in Emacs.