Eli Zaretskii <eliz@gnu.org> writes:

>
> If you edit this part of Man-completion-table:
>
>           (let ((process-environment (copy-sequence process-environment)))
>             (setenv "COLUMNS" "999") ;; don't truncate long names
>             ;; manual-program might not even exist.  And since it's
>             ;; run differently in Man-getpage-in-background, an error
>             ;; here may not necessarily mean that we'll also get an
>             ;; error later.
>             (when (eq 0
>                       (ignore-errors
>                         (process-file
>                          manual-program nil '(t nil) nil
>    >>>>>>>>>>>>>>>>      "-k" (concat (when (or Man-man-k-use-anchor
>                                                 (string-equal prefix ""))
>                                         "^")
>                                       (if (string-equal prefix "")
>                                           prefix
>                                         ;; FIXME: shell-quote-argument
>                                         ;; is not entirely
>                                         ;; appropriate: we actually
>                                         ;; need to quote ERE here.
>                                         ;; But we don't have that, and
>                                         ;; shell-quote-argument does
>                                         ;; the job...
>                                         (shell-quote-argument prefix))))))
>               (setq table (Man-parse-man-k)))))
>
> to use "-k" "-l" instead of "-k" in the line I emphasized, does that
> solve the problem?
>

Yes.  See diff patch on man.el .