Re: Clear trailing whitespace on save, but not at the cursor

[Thien-Thi Nguyen <ttn@gnuvola.org>]

() Juanma Barranquero <lekktu@gmail.com>
() Mon, 5 Mar 2012 16:07:51 +0100

   That does not answer to this part of the request:

   > I'm wondering if it's possible to do it in
   > such a way that if I save and then quit, it doesn't bug me about
   > saving because it modified the file again with the new whitespace.

If you add ‘delete-trailing-whitespace’ to ‘before-save-hook’,
then the re-adding of the string is also saved and the buffer
is left with (buffer-modified-p) => nil.

There is, anyway, a bug: The condition:

  (looking-back "\\s-+" (line-beginning-position) t)

should be expanded to something like:

  (and (looking-at "\\s-*$")
       (looking-back "\\s-+" (line-beginning-position) t))