Re: Issue 855 in lilypond: fix the command index

[lilypond]

Comment #2 on issue 855 by v.villenave: fix the command index
http://code.google.com/p/lilypond/issues/detail?id=855

Here's what I suggested in comment 4 of issue 788:

- where appropriate, we *only* index \foo entries. no more plain "foo"
- in texi2html.init, we rewrite the @printindex command so that \foo is  
ordered alphabetically just as if the backslash wasn't there
- therefore the index will no longer have this huge list under "\" (which  
is totally useless), but under the letter "A", for instance,
   annotate-spacing
   \autochange
   auto-first-page-number
   \accepts
etc.
will all be listed.