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diff --git a/Master/texmf-dist/doc/luatex/luaintro/exapd.cls b/Master/texmf-dist/doc/luatex/luaintro/exapd.cls
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+%
+% $Id: exapd.cls 631 2012-01-21 18:35:47Z herbert $
+%
+%%
+%% The LaTeX Companion, 2ed
+%%
+%% Example ``powerdot like'' class for use with the book examples.
+%%
+%% Copyright (C) 2009 Niedernair/Voss
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%%
+%% See http://www.latex-project.org/lppl.txt for details.
+%%
+%
+\RequirePackage{DEoptions}
+\DeclareOption*{\PassOptionsToClass{\CurrentOption}{powerdot}}
+\ProcessOptions\relax
+\LoadClass{powerdot}
+\RequirePackage[T1]{fontenc}
+\input{exa-fontconfig}
+\let\StartShownPreambleCommands\relax
+\let\StopShownPreambleCommands\relax
+
+% ignore second documentclass command for display in book:
+
+\renewcommand\documentclass[2][]{}
+
+\endinput 
+
+\AtBeginDocument{
+\ifx\selectcolormodel\@undefined
+\else
+  \selectcolormodel{cmyk}
+\fi
+\special{ps:
+    /setcmykcolor { exch 0.11 mul add
+                    exch 0.59 mul add
+                    exch 0.3 mul add
+                    dup 1 gt { pop 1 }  if neg 1 add setgray } def
+    /setrgbcolor { 0.11 mul
+                   exch 0.59 mul add
+                   exch 0.3 mul add setgray } def
+    /sethsbcolor { /b exch def /s exch def 6 mul dup cvi dup /i exch def sub /f exch def
+                   /F [[0 1 f sub 1][f 0 1][1 0 1 f sub][1 f 0][1 f sub 1 0][0 1 f][0 1 1]] def
+                   F i get { s mul neg 1 add b mul} forall
+                   0.11 mul
+                   exch 0.59 mul add
+                   exch 0.3 mul add setgray } def
+  }
+}
+
+\endinput
+