fish 3.0 is a major release which brings with it both improvements in functionality and some breaking changes. All fish scripts should be reviewed
IFSvariable is deprecated and will be removed in fish 4.0 (#4156).
function --on-process-exitevent will be removed in future (#4700). Use the
$_is deprecated and will removed in the future (#813). Use
status current-commandin a subshell instead.
^as a redirection deprecated and will be removed in the future. (#4394). Use
2>to redirect stderr. This is controlled by the
?as a glob is deprecated and will be removed in the future. (#4520). This is controlled by the