bug#20011: etc/PROBLEMS: updates, wording, typos

[Eli Zaretskii <eliz@gnu.org>]

> From: Ivan Shmakov <ivan@siamics.net>
> Date: Sat, 04 Apr 2015 20:20:19 +0000
> 
>  >>> There's nothing wrong with using "that" in these contexts,
> 
>  >> AIUI, there’s nothing wrong with using “which” there, either.
> 
>  > Indeed, there isn't.  But making such changes in a single document on
>  > top of that, leaving all the other uses intact, hardly makes sense.
>  > It could make sense if we agreed not to use "that" in these cases,
>  > and then changed that all over and wrote somewhere in the docs that
>  > this is our style.  But not in a single file.
> 
> 	I’ve mostly dropped these changes, or (in three cases) reworded
> 	to avoid either.
> 
>  >>> replaces a recipe with an entirely different one.  Why not keep
>  >>> both?
> 
>  >> The former recipe seems to predate the introduction of
>  >> visible-cursor.  I see no reason to keep it now that there’s an easy
>  >> way to solve the issue without having to modify terminfo or restart
>  >> Emacs, etc.  I presume that the more experienced users will be able
>  >> to gather all what necessary for a terminfo-based solution from the
>  >> “use software cursor” recipe just above the one at hand.
> 
>  > I don't know enough about this to judge, so I will defer to others.
>  > (I generally prefer to keep existing knowledge intact, even if it's
>  > old, as long as it's correct; but that's me.)
> 
> 	Done.
> 
> 	Please consider the revised patch MIMEd.

Looks good to me, thanks.