Re: Don't complain about changed file when it hasn't changed

[Karl Fogel]

I wrote:
>Paul Eggert <address@hidden> wrote:
>>On 09/06/2016 02:41 PM, Karl Fogel wrote:
>>> E.g., compressed, encrypted... what else?
>>
>>Using some coding system other than Emacs native coding, e.g., CRLF
>>instead of LF.
>
>Oy.  Right.
>
>This list of exceptions is getting long... and yet the early-out check is so 
>tempting.  Sigh.

I think what I'm wishing for is a function 
`buffer-file-verbatim-correspondence-p' (better names welcome).  Iff the 
function returns non-nil, then we can do the early-out check.

Is there anything in Emacs already that encapsulates the knowledge such a 
function would need, or is this what the consultants like to call a "green 
field opportunity"?