Re: how to create the patch from current file

[Bernardo]

Teemu Likonen said the following on 15/07/09 19:40:
> On 2009-07-15 11:22 (+0200), Michal wrote:
>
> > 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?
>
>  1) M-x diff-buffer-with-file
>
>  2) Save the file with C-u C-u C-x C-s, that is, the normal save command
>     with two prefix arguments. It will force the previously saved file
>     to become backup file and the current version is saved as the main
>     file. Then compare them.
an alternative is (before saving the file) to type:
C-x s d
this will show you the diff

if you bail out with C-g you can still switch back to *Diff* buffer and 
save it