Function wrangler_upgrade_remedy 

pub fn wrangler_upgrade_remedy(probe: &Probe) -> &'static str

#1732: how to upgrade a too-old wrangler, for where it came from. A project’s own wrangler (which the driver prefers over PATH) is upgraded in the project, since a global install wouldn’t change what runs. Shared by doctor’s row and bynk dev’s notice so the two can’t disagree. No version in it: it shows in every --format short line and the goldens.