This file is indexed.

/usr/share/X11/bindings/sun_at is in libmotif-common 2.3.8-2build1.

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: sun_at,v 1.2 2002/01/05 15:20:42 jimk Exp $
!
! "Sun Microsystems, Inc."
osfActivate     :               <Key>KP_Enter
osfCancel       :               <Key>Escape
osfHelp         :               <Key>F1
osfMenu         :Shift          <Key>F10
osfMenuBar      :               <Key>F10

osfLeft         :               <Key>Left
osfUp           :               <Key>Up
osfRight        :               <Key>Right
osfDown         :               <Key>Down

osfBeginLine    :               <Key>Home
osfEndLine      :               <Key>End

osfPageUp       :               <Key>Prior
osfPageDown     :               <Key>Next

osfBackSpace    :               <Key>BackSpace
osfDelete       :               <Key>Delete
osfInsert       :               <Key>Insert
osfAddMode      :Shift          <Key>F8