* lisp/progmodes/cperl-mode.el (cperl--package-regexp): Avoid double repetition; cperl--ws-or-comment-regexp is already repeated with 1+. * test/lisp/textmodes/dns-mode-tests.el (dns-mode-tests-dns-mode-soa-increment-serial): Escape literal '$'. * test/lisp/emacs-lisp/rx-tests.el (rx-regexp): Modify test to not trigger a linting warning while retaining its testing power.