bug#31807: 27.0; `info-apropos' bad name or bad matching

[Drew Adams]

> (setq nodename  (format "Index for '%s'" apropos-regexp))

Ouch!  Bitten by the crazy-quote monster.  Couldn't even save
the file I wrote it in - asked me about possibly saving with
Chinese this or that (in Emacs 27).

Naturally I meant this sane traditional, standard sexp instead:

(setq nodename  (format "Index for `%s'" apropos-regexp))

That's what comes from copy-pasting polluted Emacs code.