Info-goto-emacs-command-node fails on command `Info-goto-emacs-command-node'

[Drew Adams]

C-h F Info-goto-emacs-command-node ==> Can't find doc for the command.

The problem is in Info-find-emacs-command-nodes. The _Info_ manual is
getting searched, instead of the _Emacs_ manual, so no doc is found.

At least two possible solutions that I see:

1. Bind case-fold-search to nil, so that command
'Info-goto-emacs-command-node will _not_ match the regexp for info-file
info, and the default value ("emacs") for variable `info-file' will be used.
If executed with case-fold-search nil, the doc is correctly found (in the
Emacs manual).

2. Add "emacs" to the `info-file' property for this and all the other Info
commands that are doc'd in the Emacs manual (not the Info manual).

BTW, the current way of determining which manual to search seems fragile and
ad hoc. I'm not sure which code currently sets the `info-file' properties,
but perhaps the indexes of each manual could be automatically scanned and
the `info-file' property properly (explicitly) set for each command in that
manual's index. This could be done, perhaps, whenever an Info manual is
installed or is first accessed. For the standard manuals, it could be done
before dumping Emacs.

In GNU Emacs 21.3.50.1 (i386-mingw-nt5.1.2600)
 of 2004-07-26 on BERATUNG4
configured using `configure --with-gcc
(3.3) --cflags -I../../jpeg-6b-1/include -I../../libpng-1.2.4-1/include -I..
/../tiff-3.5.7/include -I../../xpm-nox-4.2.0/include -I../../zlib-1.1.4-1/in
clude'