Re: patch to quote files in source archive setup

[Bruno Haible]

Paul Eggert wrote:
> In reviewing that I found an opportunity to allow even odder situations, 
> by passing the need to use 'ls', and installed the attached followup.

Avoiding 'ls' is a nice improvement, because it removes the restrictions
on file names.

However,
  ${source_extra-"$source_extra"}
does word-splitting and globbing expansion of "$source_extra", which
(as far as I understood) is undesired.

Bruno