Ah I see. That page describes the common lisp package for Emacs Lisp. IOW while keywords are an extension to Emacs Lisp provided by the cl package, they're still a required part of the Common Lisp standard.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^11: When every microsecond counts: Parsing subroutine parameters by Joost
in thread When every microsecond counts: Parsing subroutine parameters by snowhare

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