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authorNorbert Preining <norbert@preining.info>2024-02-01 03:00:51 +0000
committerNorbert Preining <norbert@preining.info>2024-02-01 03:00:51 +0000
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+% This macro source file is from the four volume series
+% "TeX in Practice" by Stephan von Bechtolsheim, published
+% 1993 by Springer-Verlag, New York.
+% Copyright 1993 Stephan von Bechtolsheim.
+% No warranty or liability is assumed.
+% This macro may be copied freely if no fees other than
+% media cost or shipping charges are charged and as long
+% as this copyright and the following source code itself
+% is not changed. Please see the series for further information.
+%
+% Version: 1.0
+% Date: May 1, 1993
+%
+%
+% This source code is documented in 4.5.5, p. I-98.
+% Original source in file "reg2.TEX", starting line 987.
+\wlog{L: "swapbox.tip" ["reg2.TEX," l. 987, p. I-98]}%
+% This file DOES belong to format "texip."
+\catcode`\@ = 11
+\newbox\@SwapBox
+\def\SwapBoxRegs #1#2{%
+ \setbox\@SwapBox = \box#1%
+ \setbox#1 = \box#2%
+ \setbox#2 = \box\@SwapBox
+}
+\catcode`\@ = 12