/usr/share/doc/dx/help/dxall463 is in dx-doc 1:4.4.4-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#!CDarkGreen #!N #!Rall462 Help Menu #!N
#!EC #!N #!N The options in this menu are discussed in
#!Lonhelp,dxall292 h Using Online Help #!EL . #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N
#!Lcolmen,dxall464 h Colormap Menu Bar #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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