This file is indexed.

/usr/share/xindy/base/ignore-punctuation.xdy is in xindy-rules 2.4-1.3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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;; $Id: ignore-punctuation.xdy,v 1.1 2004/05/24 21:53:27 jschrod Exp $
;;------------------------------------------------------------

;;;
;;; ignore punctuation scheme
;;;
;;; all kind of punctuations are ignored during sorting
;;;

;; accents and other special characters (plus, etc) are not considered
;; punctuations.

(sort-rule "!" "")
(sort-rule "\"" "")
(sort-rule "/" "")
(sort-rule "(" "")
(sort-rule ")" "")
(sort-rule "{" "")
(sort-rule "}" "")
(sort-rule "[" "")
(sort-rule "]" "")
(sort-rule "<" "")
(sort-rule ">" "")
(sort-rule "=" "")
(sort-rule "?" "")
(sort-rule "\\" "")
(sort-rule "'" "")
(sort-rule "|" "")
(sort-rule "," "")
(sort-rule ";" "")
(sort-rule "." "")
(sort-rule ":" "")
(sort-rule "-" "")
(sort-rule "_" "")


;;======================================================================
;;
;; $Log: ignore-punctuation.xdy,v $
;; Revision 1.1  2004/05/24 21:53:27  jschrod
;;     Standard modules, introduced in "LaTeX Companion Release".
;;