Re: outline-regexp

[Richard Stallman]

The most useful way to specify outline-regexp is with a file local
variable.  That is much more useful that customizing its default
value.

I think it is useful for that variable to show up in a custom buffer,
since it is meant to be set by the user.  But we don't want the user
to actually customize it; instead, when it appears in a custom buffer,
it should say you should specify this with a file local variable.

Is there an easy way to do that?