Re: improvement for `delete-indentation'

[Stefan Monnier]

>           (delete-region (point) (+ (point) (length fill-prefix))))
> +     (if (eq ?\\ (char-syntax (preceding-char))) ; assume continued line
> +         (delete-backward-char))
>       (fixup-whitespace))))

It might not be a bad idea but I think it deserve more care.  The above
code can lead to surprises with cases such as

     (string ?\\
             ?1)

in elisp or

     line 1. \\
     line 2.

in TeX.
I suggest we only remove such a \ if it was followed by a \n and if it is
not preceded by an odd number of \.


        Stefan


PS: Luckily TeX uses / syntax rather than \ syntax for the backslash char so
the above code won't trigger.  But then your code might want to also trigger
in the case of / syntax (which is exactly the same from the C code's point
of view).