bug#57160: 28.1.91; Info Virtual Index fails on search "two column"

[Van Ly]

On Fri, 12 Aug 2022, Eli Zaretskii wrote:

> > Everyday search engines would accept "two column" and add in the hyphen.
>
> The usual method with Info is to type "two" and then TAB.

That's  very  impressive.   Findable  documentation on  using  TAB  in
various context all in one  place adds value overall.  Somewhere after
C-h a TAB  will list all the  key completions.  Since I  modify C-h to
backspace

  (keyboard-translate ?\C-h ?\C-?)

I think TAB isn't availabe after  the F1 equivalent to C-h.  The input
method for chinese-ctlaub uses TAB in the same way.

Possibly unrelated to Emacs, I see the following on invoking 'emacs -Q'

```

% /usr/X/Projects/emacs-28.1.91/src/emacs -Q

(emacs:64490): dbind-WARNING **: 05:03:23.806: AT-SPI: Error retrieving 
accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name 
org.a11y.Bus was not provided by any .service files

```