bug#20461: 25.0.50; `use-hard-newlines'

[Drew Adams <drew.adams@oracle.com>]

> I had another peek at this, and use-hard-newlines is slightly unusual
> in that many functions bind the use-hard-newlines (and use it), like:
> 
> (defun fill-flowed-encode (&optional buffer) [...]
>   (when use-hard-newlines
> 
> So we'd presumably need to rename the variable, too,

Yes, of course.  That's true of any minor mode.  Often
people do not use the variable, but they certainly can,
in general.

> and then it just seems like it's not worth it, really.

Why?  No reason given.  The right thing to do, to
respect Emacs convention and not mislead users further,
is to fix this.  And yes, of course, that means also
renaming the variable.  This is trivial to fix.