Re: how to create the patch from current file

[Pascal J. Bourguignon]

Michal <rabbitko@tenbit.pl> writes:

> Hallo group readers.
>
> Imagine the following situation:
> I just changed some part of file, but did not save it.
> Now I want to create a patch comparing to the original file.
> Do You know any emacs command that would do it for me?

C-x C-w newfile RET
M-x diff RET newfile RET oldfile RET

Eventually: M-x rename-file RET newfile RET oldfile RET
to override the oldfile by the newfile.


> Optionally I can imagine that this might even be possible after I saved
> a file. Then file~ could be used as a version before changes?

Don't count on it.  The time when a backup file is created is not
always what you'd want it to be.

-- 
__Pascal Bourguignon__