Delete trailing CR?

Delete trailing CR?

[Anonymous]

Hi. In Emacs how do I edit a file without Emacs adding a 0a byte to the end?
And how do I delete that character if it is already in the file? 
M-x delete-trailing-whitespace leaves this character at the end of the file.
Thank you.

Re: Delete trailing CR?

[Barry Margolin]

In article <mailman.12153.1351870877.855.help-gnu-emacs@gnu.org>,
 Anonymous <nobody@slug.slugish.net> wrote:

> Hi. In Emacs how do I edit a file without Emacs adding a 0a byte to the end?
> And how do I delete that character if it is already in the file? 
> M-x delete-trailing-whitespace leaves this character at the end of the file.
> Thank you.

That's not a CR (CR is 0d), it's an LF, i.e. newline.  The variable you 
want to customize is require-final-newline.

But why would you want to remove it? Text files should be a sequence of 
lines, and each line should end with a newline. Some programs don't 
process the last line correctly if it doesn't end with a newline.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

Re: Delete trailing CR?

[Dave U. Random]

Hi Barry,

> In article <mailman.12153.1351870877.855.help-gnu-emacs@gnu.org>,
>  Anonymous <nobody@slug.slugish.net> wrote:
> 
> > Hi. In Emacs how do I edit a file without Emacs adding a 0a byte to the end?
> > And how do I delete that character if it is already in the file? 
> > M-x delete-trailing-whitespace leaves this character at the end of the file.
> > Thank you.
> 
> That's not a CR (CR is 0d), it's an LF, i.e. newline.  The variable you 
> want to customize is require-final-newline.

Thanks alot on both counts!

> But why would you want to remove it? Text files should be a sequence of 
> lines, and each line should end with a newline. Some programs don't 
> process the last line correctly if it doesn't end with a newline.

I was working on test data and I needed to check files of certain
lengths. Before I read your reply I accomplished it by using hexl-mode and
changing the last character to data.

Thanks for the info for future use!

Chuck