[PATCH] *.sh: Fix kornsh-ism test(1) invocations

[Bernhard Reutner-Fischer]

On Thu, 15 Sep 2022 11:54:39 +0200
Dimitri Papadopoulos <dimitri.papadopoulos at cea.fr> wrote:

> Perhaps the double [[ == ]] can be changed to [ = ] in most cases, as it 
> implies regular expressions might be involved - but they are not.

The hunks in fetch.sh indeed should not be replaced.
If we were to be gentle we could grep instead, or use a case statement,
but that's probably not worth it.

But for all the rest plain test(1) is sufficient.

thanks,