In bash, I can write:
(cd .. && ls)
and it will run "ls" in the parent directory, but after the command executes I will not have CD'd. The CD is confined in the subshell in the ().
If I try this same command in the alternate shell "fish", it prints the error "command substitutions not allowed here" and nothing is executed. Is there a fish equivalent of "run this single line of commands in a rubber-room subshell whose variables and pwd do not escape"?
