Re: Q: text-quoting-style -- is its value a string or a symbol?

[Paul Eggert]

Drew Adams wrote:

> 1. Just because you might make use of this
>     variable in the implementation of `substitute-command-keys',
>     that is no reason to document it here.

Where should it be documented?

> 2. What does this mean?

I changed that wording just now to try to clarify it a bit.

> 3. Why is this not a _user option_, instead of an internal
>     variable?

Stefan asked that it not be a custom var; see:

https://lists.gnu.org/archive/html/emacs-devel/2015-08/msg01020.html

Seemed reasonable to me, too. Users who care about this sort of thing tend to be 
experts who don't need handholding.