emacs-28 6b5d829d9d: Add index entry for "ignore case"

[Stefan Kangas]

branch: emacs-28
commit 6b5d829d9dff0fa4bee28434c48c059107ae6c68
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Add index entry for "ignore case"
    
    * doc/emacs/glossary.texi (Glossary): Add index entry for "ignore
    case" pointing to "Case Folding".
---
 doc/emacs/glossary.texi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/emacs/glossary.texi b/doc/emacs/glossary.texi
index a78a2c9e2d..5224e31340 100644
--- a/doc/emacs/glossary.texi
+++ b/doc/emacs/glossary.texi
@@ -182,6 +182,7 @@ corresponding Control character.  @xref{User Input,C-M-}.
 Case conversion means changing text from upper case to lower case or
 vice versa.  @xref{Case}.
 
+@cindex ignore case
 @item Case Folding
 Case folding means ignoring the differences between case variants of
 the same letter: upper-case, lower-case, and title-case.  Emacs