Re: delete-trailing-whitespace and binary files

[Kim F. Storm]

Richard Stallman <address@hidden> writes:

>     1) If file is binary (how to check that?), don't delete whitespace
>        when run from a hook (how to check that?).
>
> That is so complex that I think it would be undesirable.
>
>     2) Don't consider NUL to be whitespace.
>
> That seems like a good idea.  Is there EVER a reason for
> delete-trailing-whitespace to delete NUL?

If the syntax table says that NUL is whitespace, I guess it should do it...


I looked a little further at this.

Opening file spook.lines selects text-mode.

text-mode is derived from Fundamental-mode, which has
a somewhat peculiar (IMO) interpretation of "whitespace":

C-@ .. SPC              which means: whitespace
DEL .. ÿ                which means: whitespace
                        which means: whitespace
      .. ​              which means: whitespace
<<default>>             which means: whitespace


So delete-trailing-whitespace just does what it's supposed to do.

Is there a better major-mode to choose for spook.lines (e.g. via a
file local variable)?

-- 
Kim F. Storm <address@hidden> http://www.cua.dk