Subject: bug#71840: 30.0.60; Reference to non-existent variable in c-opt-extra-label-key docstring

From: Stefan Kangas <[email-masked]>
Date: Sat, 29 Jun 2024 06:12:10 -0700

Severity: minor

There is a reference to a variable `c-nonlabel-decl-prefix-re` in the
`c-opt-extra-label-key` docstring (cc-langs.el:4400), but I can't find
that variable anywhere in our tree.