bug#45178: buffer-hash docstring should explain difference to secure-hash

[Basil L. Contovounesios]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Stefan Kangas <stefan@marxist.se> writes:
>
>> I guess what I don't understand is why I would _ever_ want to use this
>> function.  I mean, why not just compare buffers using `secure-hash'?
>
> `buffer-hash' is fast, so you can use it to compare the buffer contents
> before and after doing things like `indent-sexp' to see whether that
> changed anything.

[I get that this is just an example, but in this case wouldn't you use
 buffer-modified-tick or buffer-chars-modified-tick instead?]

-- 
Basil