Wheeler: Fixing Unix/Linux/POSIX Filenames

At work I co-maintain scripts in a third class: scripts that come with
an 'appliance' (for this purpose, a set of software which is the raison
d'etre of the hardware for which it is bought: this could be a tiny
embedded system or a giant bank database or simulation box). In this case,
they can dictate whatever shell they damn well like.

I dictated zsh 4, simply because for this application C was far too
unpleasant, ksh was too buggy (thanks, Linux, for pdksh, with its broken
propagation of variables out of loops-with-redirection), and there was no
hope of getting the clients' systems people to install Perl: but they were
perfectly happy to install a recent zsh: fewer dependencies and no scary
modules (well, actually zsh *does* have a module system but they didn't
realise that!)