bug#19350: #19350 24.4; Incorrect quoting of %-signs for Windows command shell

[Noam Postavsky]

On Wed, Aug 17, 2016 at 10:02 PM, Demi Obenour <demiobenour@gmail.com> wrote:
> But *nix has no such feature, nor the associated gotcha.

By "feature" you mean having variables whose name ends in a caret (or
other escape character)? It's true that existing *nix shells don't,
but the OS does support them (and so hypothetical shells could do as
well):

(let ((process-environment (cons "ca^=with-caret" process-environment)))
  (shell-command-to-string "python -c 'import
os;print(os.environ[\"ca^\"])'")) ;=> "with-caret\n"