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diff --git a/macros/latex/contrib/beamer/base/emulation/beamertexpower.sty b/macros/latex/contrib/beamer/base/emulation/beamertexpower.sty
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+% Copyright 2003--2007 by Till Tantau
+% Copyright 2010 by Vedran Mileti\'c
+% Copyright 2015 by Vedran Mileti\'c, Joseph Wright
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/licenses/LICENSE for more details.
+
+\long\def\stepwise#1{{\nonboxedsteps#1}}
+\long\def\parstepwise#1{{\boxedsteps#1}}
+\long\def\liststepwise{\vspace*{\parskip}\hrule \@height\z@\stepwise}
+\long\def\step#1{\beamerpower@action<+(1)->{#1}}
+\long\def\steponce#1{\beamerpower@action<+(1)>{#1}}
+\long\def\switch#1#2{\alt<+(1)->{#2}{#1}}
+\long\def\bstep#1{{\boxedsteps\step{#1}}}
+\long\def\dstep{\addtocounter{beamerpauses}{1}}
+\long\def\vstep{\addtocounter{beamerpauses}{1}}
+
+\def\restep{\addtocounter{beamerpauses}{-1}\step}
+\def\reswitch{\addtocounter{beamerpauses}{-1}\switch}
+\def\rebstep{\addtocounter{beamerpauses}{-1}\bstep}
+\def\redstep{\addtocounter{beamerpauses}{-1}\dstep}
+\def\revstep{\addtocounter{beamerpauses}{-1}\vstep}
+
+\def\boxedsteps{\let\beamerpower@action=\uncover}
+\def\nonboxedsteps{\let\beamerpower@action=\only}
+\boxedsteps
+
+\DeclareRobustCommand{\code}[1]{\textbf{\texttt{#1}}}%
+\DeclareRobustCommand{\codeswitch}{\bfseries\ttfamily}%